solution/1_querying_crossref.ipynb

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   "cell_type": "markdown",
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   "source": [
    "## Querying crossref\n",
    "\n",
    "\n",
    "### Step 1: load packages\n",
    "\n",
    "* **jsonlite** for working with JSON\n",
    "* **purrr** for working with vectors\n",
    "* **dplyr** for data manipulation\n",
    "\n",
    "If necessary, install the packages before loading them."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Warning message:\n",
      "\"package 'jsonlite' was built under R version 4.1.1\"\n",
      "Warning message:\n",
      "\"package 'purrr' was built under R version 4.1.1\"\n",
      "\n",
      "Attaching package: 'purrr'\n",
      "\n",
      "\n",
      "The following object is masked from 'package:jsonlite':\n",
      "\n",
      "    flatten\n",
      "\n",
      "\n",
      "Warning message:\n",
      "\"package 'dplyr' was built under R version 4.1.0\"\n",
      "\n",
      "Attaching package: 'dplyr'\n",
      "\n",
      "\n",
      "The following objects are masked from 'package:stats':\n",
      "\n",
      "    filter, lag\n",
      "\n",
      "\n",
      "The following objects are masked from 'package:base':\n",
      "\n",
      "    intersect, setdiff, setequal, union\n",
      "\n",
      "\n"
     ]
    }
   ],
   "source": [
    "#install.packages(\"jsonlite\")\n",
    "#install.packages(\"purrr\")\n",
    "#install.packages(\"dplyr\")\n",
    "library(jsonlite)\n",
    "library(purrr)\n",
    "library(dplyr)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 2: specify the query parameters\n",
    "\n",
    "For our use case, we want to retrieve *DOIs of publications published since 2015 from authors that are afiiliated with a specific organization (Humboldt-Universität zu Berlin)*.\n",
    "\n",
    "The crossref API is well documented (see [here](https://github.com/CrossRef/rest-api-doc)) and offers many functionalities.\n",
    "In the query URL we build, we first specify that we are interested in *works*.\n",
    "\n",
    "Crossref has not yet implemented organisation identifiers in the affiliation information (see the schema definition [here](https://data.crossref.org/schemas/common4.4.2.xsd)). Therefore, we have to rely on searching for name variants in the affiliation field. Here, we pass the term \"humboldt+universit+berlin\"to the query parameter *query.affiliation*. (For demonstration purposes, we use a very simple query and clean the data afterwards. To ensure that all publications from authors affiliated with an organization are found, multiple name variants should be used - see [this example](https://github.com/tuub/oa-eval).)\n",
    "\n",
    "We use the filter *from-pub-date* with the value 2015-01-01 to limit results to publications published sinc 2015.\n",
    "\n",
    "Below, the resulting query is stored in the object *query*."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "query <- \"https://api.crossref.org/works?query.affiliation=humboldt+universit+berlin&filter=from-pub-date:2015-01-01\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 3: politely using APIs\n",
    "\n",
    "APIs offer valuable services to many people and organizations. Therefore, it is important to *politely* use APIs and not burden them with too many requests.  Some services regularly make data dumps available, so you might not even have to use the service's API.\n",
    "\n",
    "Some APIs specify polite use in their documentation, including crossref (see [here](https://github.com/CrossRef/rest-api-doc#etiquette)). To comply with the API etiquette, we will append the *mailto* parameter to the query. This allows crossref to contact us in case there are any issues with our query."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "# change this value to your mail adress:\n",
    "mailto <- \"&mailto=jdoe@example.org\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 4: exploring the results\n",
    "\n",
    "The crossref API returns results in JSON, a common data format. We concatenate the strings *query* and *mailto* and pass the new URL string to the function *fromJSON*. The function retrieves and converts results from JSON to R objects. We store the converted results in the object *results*."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "# using fromJSON + query URL to retrieve and parse results\n",
    "results <- jsonlite::fromJSON(paste0(query, mailto))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Information in JSON objects is stored similarly to nested lists with names. Therefore, we can access a specific piece of information by subsetting the *results* object using names. Here, we want to access DOIs, publication year, type and author information of publications matching the query. Notice that results are returned in different classes - two character vectors, one data frame, and a list of data frames.\n",
    "\n",
    "By default, crossref returns 20 items at a time."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
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       " [7] \"10.1145/2882903.2903736\"           \"10.1145/3364452.33644558\"         \n",
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       "[11] \"10.1080/17565529.2019.1596063\"     \"10.1111/sms.13979\"                \n",
       "[13] \"10.1080/13504851.2019.1610703\"     \"10.1145/3149485.3149492\"          \n",
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       "<caption>A data.frame: 19 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th></tr>\n",
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       "\t<tr><th scope=row>1</th><td>Simon    </td><td>Schroeder   </td><td>first     </td><td>Charité-Universitätsmedizin Berlin</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Christin </td><td>Mache       </td><td>additional</td><td>Robert Koch Institut</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Hannah   </td><td>Kleine-Weber</td><td>additional</td><td>German Primate Center</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Doreen   </td><td>Muth        </td><td>additional</td><td>Charité-Universitätsmedizin Berlin</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>5</th><td><span style=white-space:pre-wrap>Victor   </span></td><td><span style=white-space:pre-wrap>Corman      </span></td><td>additional</td><td>Charité-Universitätsmedizin Berlin, corporate member of Freie Universit&amp;#x00E4;t Berlin, Humboldt-Universit&amp;#x00E4;t zu Berlin, and Berlin Institute of Health, Institute of Virology</td><td>http://orcid.org/0000-0002-3605-0136</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>6</th><td>Diana    </td><td>Fatykhova   </td><td>additional</td><td>Charité-Universitätsmedizin Berlin</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>7</th><td><span style=white-space:pre-wrap>Ziad Al  </span></td><td><span style=white-space:pre-wrap>Memish      </span></td><td>additional</td><td>Research and Innovation Department, King Saud Medical City, Ministry of Health &amp; College of Medicine, Alfaisal University, Riyadh, Kingdom of Saudi Arabia &amp; Hubert Department of Global Health, Rollins School of Public Health, Emory University</td><td><span style=white-space:pre-wrap>NA                                  </span></td><td><span style=white-space:pre-wrap>   NA</span></td></tr>\n",
       "\t<tr><th scope=row>8</th><td>Megan    </td><td>Stanifer    </td><td>additional</td><td>University Hospital Heidelberg and DKFZ</td><td>http://orcid.org/0000-0002-5606-1297</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>9</th><td>Steeve   </td><td>Boulant     </td><td>additional</td><td>Department of Infectious Diseases, Heidelberg University Hospital</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>10</th><td>Ronald   </td><td>Dijkman     </td><td>additional</td><td>University of Bern</td><td>http://orcid.org/0000-0003-0320-2743</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>11</th><td>Anja     </td><td>Richter     </td><td>additional</td><td>Institute of Virology, Charité-Universitätsmedizin</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>12</th><td>Stefan   </td><td>Eggeling    </td><td>additional</td><td>Vivantes Clinics Neukölln</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>13</th><td>Andreas  </td><td>Hocke       </td><td>additional</td><td>Charité - Universitätsmedizin Berlin</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>14</th><td>Stefan   </td><td>Hippenstiel </td><td>additional</td><td>Charité - Universitätsmedizin Berlin</td><td>http://orcid.org/0000-0002-5146-1064</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>15</th><td>Volker   </td><td>Thiel       </td><td>additional</td><td>Institute of Virology and Immunology, Bern, Switzerland</td><td>http://orcid.org/0000-0002-5783-0887</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>16</th><td>Stefan   </td><td>Pöhlmann    </td><td>additional</td><td>German Primate Center - Leibniz Institute for Primate Research</td><td>http://orcid.org/0000-0001-6086-9136</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>17</th><td>Thorsten </td><td>Wolff       </td><td>additional</td><td>Robert Koch Institute</td><td>http://orcid.org/0000-0001-7688-236X</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>18</th><td>Marcel   </td><td>Müller      </td><td>additional</td><td>Institute of Virology, Charité - Universitätsmedizin Berlin, corporatemember of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute ofHealth</td><td>http://orcid.org/0000-0003-2242-5117</td><td>FALSE</td></tr>\n",
       "\t<tr><th scope=row>19</th><td>Christian</td><td>Drosten     </td><td>additional</td><td>Charite - Universitätsmedizin Berlin</td><td>http://orcid.org/0000-0001-7923-0519</td><td>FALSE</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 3 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Angelika</td><td>T&lt;U+FFFD&gt;lle</td><td><span style=white-space:pre-wrap>first     </span></td><td>Department of Urology, Charit&lt;U+FFFD&gt;-Universit&lt;U+FFFD&gt;tsmedizin Berlin, D-10117 Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>2</th><td><span style=white-space:pre-wrap>Laura   </span></td><td><span style=white-space:pre-wrap>Buckendahl  </span></td><td>additional</td><td>Department of Urology, Charit&lt;U+FFFD&gt;-Universit&lt;U+FFFD&gt;tsmedizin Berlin, D-10117 Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td><span style=white-space:pre-wrap>Klaus   </span></td><td><span style=white-space:pre-wrap>Jung        </span></td><td>additional</td><td>Department of Urology, Charit&lt;U+FFFD&gt;-Universit&lt;U+FFFD&gt;tsmedizin Berlin, D-10117 Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 5 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Paris   </td><td>Carbone     </td><td>first     </td><td>KTH Royal Institute of Technology, Stockholm, Sweden</td></tr>\n",
       "\t<tr><th scope=row>2</th><td><span style=white-space:pre-wrap>Jonas   </span></td><td><span style=white-space:pre-wrap>Traub       </span></td><td>additional</td><td>Technische Universitat Berlin &amp;amp; DFKI, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Asterios</td><td>Katsifodimos</td><td>additional</td><td>Technische Universitat Berlin &amp;amp; DFKI, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Seif    </td><td>Haridi      </td><td>additional</td><td>KTH Royal Institute of Technology, Stockholm, Sweden</td></tr>\n",
       "\t<tr><th scope=row>5</th><td><span style=white-space:pre-wrap>Volker  </span></td><td><span style=white-space:pre-wrap>Markl       </span></td><td>additional</td><td>Technische Universitat Berlin &amp;amp; DFKI, Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 18 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>http://orcid.org/0000-0002-1456-5278</td><td>FALSE</td><td>Björn       </td><td>Goldenbogen    </td><td>first     </td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>NA                                  </td><td>   NA</td><td>Stephan     </td><td>Adler          </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>NA                                  </td><td>   NA</td><td>Oliver      </td><td>Bodeit         </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>NA                                  </td><td>   NA</td><td>Judith      </td><td>Wodke          </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>NA                                  </td><td>   NA</td><td>Ximena      </td><td>Escalera-Fanjul</td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>6</th><td>http://orcid.org/0000-0002-4070-5393</td><td>FALSE</td><td>Aviv        </td><td>Korman         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>7</th><td>NA                                  </td><td>   NA</td><td>Maria       </td><td>Krantz         </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>8</th><td>NA                                  </td><td>   NA</td><td>Lasse       </td><td>Bonn           </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>9</th><td>NA                                  </td><td>   NA</td><td>Rafael Moran</td><td>Torres         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>10</th><td>NA                                  </td><td>   NA</td><td>Johanna     </td><td>Haffner        </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>11</th><td>NA                                  </td><td>   NA</td><td>Maxim       </td><td>Karnetzki      </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>12</th><td>NA                                  </td><td>   NA</td><td>Ivo         </td><td>Maintz         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>13</th><td>NA                                  </td><td>   NA</td><td>Lisa        </td><td>Mallis         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>14</th><td>NA                                  </td><td>   NA</td><td>Hannah      </td><td>Prawitz        </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>15</th><td>NA                                  </td><td>   NA</td><td>Patrick     </td><td>Segelitz       </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>16</th><td>http://orcid.org/0000-0001-5602-6080</td><td>FALSE</td><td>Martin      </td><td>Seeger         </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>17</th><td>NA                                  </td><td>   NA</td><td>Rune        </td><td>Linding        </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>18</th><td>http://orcid.org/0000-0002-0567-7075</td><td>FALSE</td><td>Edda        </td><td>Klipp          </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 18 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>http://orcid.org/0000-0002-1456-5278</td><td>FALSE</td><td>Björn       </td><td>Goldenbogen    </td><td>first     </td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>NA                                  </td><td>   NA</td><td>Stephan     </td><td>Adler          </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>NA                                  </td><td>   NA</td><td>Oliver      </td><td>Bodeit         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>NA                                  </td><td>   NA</td><td>Judith      </td><td>Wodke          </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>NA                                  </td><td>   NA</td><td>Ximena      </td><td>Escalera-Fanjul</td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>6</th><td>http://orcid.org/0000-0002-4070-5393</td><td>FALSE</td><td>Aviv        </td><td>Korman         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>7</th><td>NA                                  </td><td>   NA</td><td>Maria       </td><td>Krantz         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>8</th><td>NA                                  </td><td>   NA</td><td>Lasse       </td><td>Bonn           </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>9</th><td>NA                                  </td><td>   NA</td><td>Rafael Moran</td><td>Torres         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>10</th><td>NA                                  </td><td>   NA</td><td>Johanna     </td><td>Haffner        </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>11</th><td>NA                                  </td><td>   NA</td><td>Maxim       </td><td>Karnetzki      </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>12</th><td>NA                                  </td><td>   NA</td><td>Ivo         </td><td>Maintz         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>13</th><td>NA                                  </td><td>   NA</td><td>Lisa        </td><td>Mallis         </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>14</th><td>NA                                  </td><td>   NA</td><td>Hannah      </td><td>Prawitz        </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>15</th><td>NA                                  </td><td>   NA</td><td>Patrick     </td><td>Segelitz       </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>16</th><td>http://orcid.org/0000-0001-5602-6080</td><td>FALSE</td><td>Martin      </td><td>Seeger         </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>17</th><td>NA                                  </td><td>   NA</td><td>Rune        </td><td>Linding        </td><td>additional</td><td>Humboldt-Universitaet zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>18</th><td>http://orcid.org/0000-0002-0567-7075</td><td>FALSE</td><td>Edda        </td><td>Klipp          </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 12 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>http://orcid.org/0000-0002-2592-4168</td><td>FALSE</td><td>Michael </td><td>Bojdys    </td><td>first     </td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>NA                                  </td><td>   NA</td><td>Jieyang </td><td>Huang     </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>NA                                  </td><td>   NA</td><td>Anna    </td><td>Urbanski  </td><td>additional</td><td>Leibniz-Institut für Polymerforschung Dresden (IPF) e. V.</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>NA                                  </td><td>   NA</td><td>Andréa  </td><td>Martin    </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>NA                                  </td><td>   NA</td><td>Ranjit  </td><td>Kulkarni  </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>6</th><td>http://orcid.org/0000-0002-7330-2451</td><td>FALSE</td><td>Patrick </td><td>Amsalem   </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>7</th><td>NA                                  </td><td>   NA</td><td>Moritz  </td><td>Exner     </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>8</th><td>NA                                  </td><td>   NA</td><td>Johannes</td><td>Müller    </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>9</th><td>NA                                  </td><td>   NA</td><td>David   </td><td>Burmeister</td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>10</th><td>http://orcid.org/0000-0002-6042-6447</td><td>FALSE</td><td>Norbert </td><td>Koch      </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>11</th><td>NA                                  </td><td>   NA</td><td>Nicola  </td><td>Pinna     </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>12</th><td>NA                                  </td><td>   NA</td><td>Petra   </td><td>Uhlmann   </td><td>additional</td><td>Leibniz-Institut für Polymerforschung Dresden (IPF) e. V.</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 5 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Astrid</td><td>Rheinländer</td><td>first     </td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Mario </td><td>Lehmann    </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Anja  </td><td>Kunkel     </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Jörg  </td><td>Meier      </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>Ulf   </td><td>Leser      </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 5 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Yannic   </td><td>Noller </td><td>first     </td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Hoang Lam</td><td>Nguyen </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Minxing  </td><td>Tang   </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Timo     </td><td>Kehrer </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>Lars     </td><td>Grunske</td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 5 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>http://orcid.org/0000-0002-0519-6087</td><td>FALSE</td><td>Michael  </td><td>Dürfeld</td><td>first     </td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>NA                                  </td><td>   NA</td><td>Anika    </td><td>Schultz</td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>NA                                  </td><td>   NA</td><td>Christian</td><td>Stein  </td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>NA                                  </td><td>   NA</td><td>Benjamin </td><td>Thomack</td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>NA                                  </td><td>   NA</td><td>Nadia    </td><td>Zeissig</td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 5 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>http://orcid.org/0000-0002-7799-8409</td><td>FALSE</td><td>Insa       </td><td>Wessels</td><td>first     </td><td>bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany             , Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>NA                                  </td><td>   NA</td><td>Julia      </td><td>Rueß   </td><td>additional</td><td>bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>NA                                  </td><td>   NA</td><td>Christopher</td><td>Gess   </td><td>additional</td><td>bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>NA                                  </td><td>   NA</td><td>Wolfgang   </td><td>Deicke </td><td>additional</td><td>bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>NA                                  </td><td>   NA</td><td>Matthias   </td><td>Ziegler</td><td>additional</td><td>Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 3 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Frederick       </td><td>Dapilah</td><td>first     </td><td>IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Jonas Østergaard</td><td>Nielsen</td><td>additional</td><td>IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Cecilie         </td><td>Friis  </td><td>additional</td><td>IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 7 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>http://orcid.org/0000-0001-7180-7109</td><td>FALSE</td><td>Falk       </td><td>Mersmann  </td><td>first     </td><td>Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           </td></tr>\n",
       "\t<tr><th scope=row>2</th><td>http://orcid.org/0000-0001-9941-6716</td><td>FALSE</td><td>Theresa    </td><td>Domroes   </td><td>additional</td><td>Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           </td></tr>\n",
       "\t<tr><th scope=row>3</th><td>NA                                  </td><td>   NA</td><td>Nikolaos   </td><td>Pentidis  </td><td>additional</td><td>Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           </td></tr>\n",
       "\t<tr><th scope=row>4</th><td>NA                                  </td><td>   NA</td><td>Meng-Shiuan</td><td>Tsai      </td><td>additional</td><td>Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           </td></tr>\n",
       "\t<tr><th scope=row>5</th><td>http://orcid.org/0000-0002-5720-3672</td><td>FALSE</td><td>Sebastian  </td><td>Bohm      </td><td>additional</td><td>Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           </td></tr>\n",
       "\t<tr><th scope=row>6</th><td>NA                                  </td><td>   NA</td><td>Arno       </td><td>Schroll   </td><td>additional</td><td>Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           </td></tr>\n",
       "\t<tr><th scope=row>7</th><td>http://orcid.org/0000-0002-4985-0335</td><td>FALSE</td><td>Adamantios </td><td>Arampatzis</td><td>additional</td><td>Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           </td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 4 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Steffen </td><td>Volkenand</td><td>first     </td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Guenther</td><td>Filler   </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Marlene </td><td>Kionka   </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Martin  </td><td>Odening  </td><td>additional</td><td>Humboldt-Universität zu Berlin, Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 4 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Yannic   </td><td>Noller</td><td>first     </td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Hoang Lam</td><td>Nguyen</td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Minxing  </td><td>Tang  </td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Timo     </td><td>Kehrer</td><td>additional</td><td>Humboldt University of Berlin</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 4 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Steffen</td><td>Hackbarth</td><td>first     </td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Michael</td><td>Pfitzner </td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Jakob  </td><td>Pohl     </td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Beate  </td><td>Röder    </td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 4 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Malte    </td><td>Belz      </td><td>first     </td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Simon    </td><td>Sauer     </td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Anke     </td><td>Lüdeling  </td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Christine</td><td>Mooshammer</td><td>additional</td><td>Humboldt-Universität zu Berlin</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 6 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Arne     </td><td>Hillebrand        </td><td>first     </td><td>Humboldt University Berlin, Molecular Genetics, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Joachim M</td><td>Matz              </td><td>additional</td><td>Humboldt University, Department of Molecular Parasitology, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Martin   </td><td>Almendinger       </td><td>additional</td><td>Humboldt University Berlin, Molecular Genetics, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Katja    </td><td>Müller            </td><td>additional</td><td>Humboldt University, Department of Molecular Parasitology, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>Kai      </td><td>Matuschewski      </td><td>additional</td><td>Humboldt University, Department of Molecular Parasitology, Berlin, Germany</td></tr>\n",
       "\t<tr><th scope=row>6</th><td>Christian</td><td>Schmitz-Linneweber</td><td>additional</td><td>Humboldt University Berlin, Molecular Genetics, Berlin, Germany</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 10 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>Cindy  </td><td>Ritter    </td><td>first     </td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Eduard </td><td>Maier     </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>3</th><td>Undine </td><td>Schneeweiß</td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>4</th><td>Tanja  </td><td>Wölk      </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>Jean   </td><td>Simonnet  </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>6</th><td>Safaa  </td><td>Malkawi   </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>7</th><td>Lennart</td><td>Eigen     </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>8</th><td>Elcin  </td><td>Tunckol   </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>9</th><td>Leopold</td><td>Purkart   </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany</td><td>NA                                  </td><td>   NA</td></tr>\n",
       "\t<tr><th scope=row>10</th><td>Michael</td><td>Brecht    </td><td>additional</td><td>Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany, NeuroCure Cluster of Excellence Humboldt-Universität zu Berlin  Berlin Germany                       </td><td>http://orcid.org/0000-0002-5387-0953</td><td>FALSE</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 7 × 4</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td><span style=white-space:pre-wrap>Sara        </span></td><td><span style=white-space:pre-wrap>ZAVAREH   </span></td><td><span style=white-space:pre-wrap>first     </span></td><td>Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin</td></tr>\n",
       "\t<tr><th scope=row>2</th><td>Andr&amp;eacute;</td><td><span style=white-space:pre-wrap>HILGER    </span></td><td>additional</td><td>Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy</td></tr>\n",
       "\t<tr><th scope=row>3</th><td><span style=white-space:pre-wrap>Kathrin     </span></td><td>HIRSELANDT</td><td>additional</td><td>Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin</td></tr>\n",
       "\t<tr><th scope=row>4</th><td><span style=white-space:pre-wrap>Oliver      </span></td><td><span style=white-space:pre-wrap>GOERKE    </span></td><td>additional</td><td>Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin</td></tr>\n",
       "\t<tr><th scope=row>5</th><td>Ingo        </td><td>MANKE     </td><td>additional</td><td>Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy</td></tr>\n",
       "\t<tr><th scope=row>6</th><td>John        </td><td>BANHART   </td><td>additional</td><td>Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy</td></tr>\n",
       "\t<tr><th scope=row>7</th><td><span style=white-space:pre-wrap>Aleksander  </span></td><td><span style=white-space:pre-wrap>GURLO     </span></td><td>additional</td><td>Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin</td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "\t<li><table class=\"dataframe\">\n",
       "<caption>A data.frame: 5 × 6</caption>\n",
       "<thead>\n",
       "\t<tr><th></th><th scope=col>ORCID</th><th scope=col>authenticated-orcid</th><th scope=col>given</th><th scope=col>family</th><th scope=col>sequence</th><th scope=col>affiliation</th></tr>\n",
       "\t<tr><th></th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;lgl&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;chr&gt;</th><th scope=col>&lt;list&gt;</th></tr>\n",
       "</thead>\n",
       "<tbody>\n",
       "\t<tr><th scope=row>1</th><td>http://orcid.org/0000-0002-5720-3672</td><td>TRUE</td><td>Sebastian </td><td>Bohm      </td><td>first     </td><td>Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           </td></tr>\n",
       "\t<tr><th scope=row>2</th><td>http://orcid.org/0000-0001-7180-7109</td><td>TRUE</td><td>Falk      </td><td>Mersmann  </td><td>additional</td><td>Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           </td></tr>\n",
       "\t<tr><th scope=row>3</th><td>http://orcid.org/0000-0002-6577-5101</td><td>TRUE</td><td>Alessandro</td><td>Santuz    </td><td>additional</td><td>Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           </td></tr>\n",
       "\t<tr><th scope=row>4</th><td>NA                                  </td><td>  NA</td><td>Arno      </td><td>Schroll   </td><td>additional</td><td>Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           </td></tr>\n",
       "\t<tr><th scope=row>5</th><td>http://orcid.org/0000-0002-4985-0335</td><td>TRUE</td><td>Adamantios</td><td>Arampatzis</td><td>additional</td><td>Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           </td></tr>\n",
       "</tbody>\n",
       "</table>\n",
       "</li>\n",
       "</ol>\n"
      ],
      "text/latex": [
       "\\begin{enumerate}\n",
       "\\item A data.frame: 19 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & given & family & sequence & affiliation & ORCID & authenticated-orcid\\\\\n",
       "  & <chr> & <chr> & <chr> & <list> & <chr> & <lgl>\\\\\n",
       "\\hline\n",
       "\t1 & Simon     & Schroeder    & first      & Charité-Universitätsmedizin Berlin & NA                                   &    NA\\\\\n",
       "\t2 & Christin  & Mache        & additional & Robert Koch Institut & NA                                   &    NA\\\\\n",
       "\t3 & Hannah    & Kleine-Weber & additional & German Primate Center & NA                                   &    NA\\\\\n",
       "\t4 & Doreen    & Muth         & additional & Charité-Universitätsmedizin Berlin & NA                                   &    NA\\\\\n",
       "\t5 & Victor    & Corman       & additional & Charité-Universitätsmedizin Berlin, corporate member of Freie Universit\\&\\#x00E4;t Berlin, Humboldt-Universit\\&\\#x00E4;t zu Berlin, and Berlin Institute of Health, Institute of Virology & http://orcid.org/0000-0002-3605-0136 & FALSE\\\\\n",
       "\t6 & Diana     & Fatykhova    & additional & Charité-Universitätsmedizin Berlin & NA                                   &    NA\\\\\n",
       "\t7 & Ziad Al   & Memish       & additional & Research and Innovation Department, King Saud Medical City, Ministry of Health \\& College of Medicine, Alfaisal University, Riyadh, Kingdom of Saudi Arabia \\& Hubert Department of Global Health, Rollins School of Public Health, Emory University & NA                                   &    NA\\\\\n",
       "\t8 & Megan     & Stanifer     & additional & University Hospital Heidelberg and DKFZ & http://orcid.org/0000-0002-5606-1297 & FALSE\\\\\n",
       "\t9 & Steeve    & Boulant      & additional & Department of Infectious Diseases, Heidelberg University Hospital & NA                                   &    NA\\\\\n",
       "\t10 & Ronald    & Dijkman      & additional & University of Bern & http://orcid.org/0000-0003-0320-2743 & FALSE\\\\\n",
       "\t11 & Anja      & Richter      & additional & Institute of Virology, Charité-Universitätsmedizin & NA                                   &    NA\\\\\n",
       "\t12 & Stefan    & Eggeling     & additional & Vivantes Clinics Neukölln & NA                                   &    NA\\\\\n",
       "\t13 & Andreas   & Hocke        & additional & Charité - Universitätsmedizin Berlin & NA                                   &    NA\\\\\n",
       "\t14 & Stefan    & Hippenstiel  & additional & Charité - Universitätsmedizin Berlin & http://orcid.org/0000-0002-5146-1064 & FALSE\\\\\n",
       "\t15 & Volker    & Thiel        & additional & Institute of Virology and Immunology, Bern, Switzerland & http://orcid.org/0000-0002-5783-0887 & FALSE\\\\\n",
       "\t16 & Stefan    & Pöhlmann     & additional & German Primate Center - Leibniz Institute for Primate Research & http://orcid.org/0000-0001-6086-9136 & FALSE\\\\\n",
       "\t17 & Thorsten  & Wolff        & additional & Robert Koch Institute & http://orcid.org/0000-0001-7688-236X & FALSE\\\\\n",
       "\t18 & Marcel    & Müller       & additional & Institute of Virology, Charité - Universitätsmedizin Berlin, corporatemember of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute ofHealth & http://orcid.org/0000-0003-2242-5117 & FALSE\\\\\n",
       "\t19 & Christian & Drosten      & additional & Charite - Universitätsmedizin Berlin & http://orcid.org/0000-0001-7923-0519 & FALSE\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 3 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Angelika & T<U+FFFD>lle & first      & Department of Urology, Charit<U+FFFD>-Universit<U+FFFD>tsmedizin Berlin, D-10117 Berlin, Germany\\\\\n",
       "\t2 & Laura    & Buckendahl   & additional & Department of Urology, Charit<U+FFFD>-Universit<U+FFFD>tsmedizin Berlin, D-10117 Berlin, Germany\\\\\n",
       "\t3 & Klaus    & Jung         & additional & Department of Urology, Charit<U+FFFD>-Universit<U+FFFD>tsmedizin Berlin, D-10117 Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 5 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Paris    & Carbone      & first      & KTH Royal Institute of Technology, Stockholm, Sweden\\\\\n",
       "\t2 & Jonas    & Traub        & additional & Technische Universitat Berlin \\&amp; DFKI, Berlin, Germany\\\\\n",
       "\t3 & Asterios & Katsifodimos & additional & Technische Universitat Berlin \\&amp; DFKI, Berlin, Germany\\\\\n",
       "\t4 & Seif     & Haridi       & additional & KTH Royal Institute of Technology, Stockholm, Sweden\\\\\n",
       "\t5 & Volker   & Markl        & additional & Technische Universitat Berlin \\&amp; DFKI, Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 18 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & ORCID & authenticated-orcid & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <lgl> & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & http://orcid.org/0000-0002-1456-5278 & FALSE & Björn        & Goldenbogen     & first      & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t2 & NA                                   &    NA & Stephan      & Adler           & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t3 & NA                                   &    NA & Oliver       & Bodeit          & additional & Humboldt University of Berlin\\\\\n",
       "\t4 & NA                                   &    NA & Judith       & Wodke           & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t5 & NA                                   &    NA & Ximena       & Escalera-Fanjul & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t6 & http://orcid.org/0000-0002-4070-5393 & FALSE & Aviv         & Korman          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t7 & NA                                   &    NA & Maria        & Krantz          & additional & Humboldt University of Berlin\\\\\n",
       "\t8 & NA                                   &    NA & Lasse        & Bonn            & additional & Humboldt University of Berlin\\\\\n",
       "\t9 & NA                                   &    NA & Rafael Moran & Torres          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t10 & NA                                   &    NA & Johanna      & Haffner         & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t11 & NA                                   &    NA & Maxim        & Karnetzki       & additional & Humboldt University of Berlin\\\\\n",
       "\t12 & NA                                   &    NA & Ivo          & Maintz          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t13 & NA                                   &    NA & Lisa         & Mallis          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t14 & NA                                   &    NA & Hannah       & Prawitz         & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t15 & NA                                   &    NA & Patrick      & Segelitz        & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t16 & http://orcid.org/0000-0001-5602-6080 & FALSE & Martin       & Seeger          & additional & Humboldt University of Berlin\\\\\n",
       "\t17 & NA                                   &    NA & Rune         & Linding         & additional & Humboldt University of Berlin\\\\\n",
       "\t18 & http://orcid.org/0000-0002-0567-7075 & FALSE & Edda         & Klipp           & additional & Humboldt University of Berlin\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 18 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & ORCID & authenticated-orcid & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <lgl> & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & http://orcid.org/0000-0002-1456-5278 & FALSE & Björn        & Goldenbogen     & first      & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t2 & NA                                   &    NA & Stephan      & Adler           & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t3 & NA                                   &    NA & Oliver       & Bodeit          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t4 & NA                                   &    NA & Judith       & Wodke           & additional & Humboldt University of Berlin\\\\\n",
       "\t5 & NA                                   &    NA & Ximena       & Escalera-Fanjul & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t6 & http://orcid.org/0000-0002-4070-5393 & FALSE & Aviv         & Korman          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t7 & NA                                   &    NA & Maria        & Krantz          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t8 & NA                                   &    NA & Lasse        & Bonn            & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t9 & NA                                   &    NA & Rafael Moran & Torres          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t10 & NA                                   &    NA & Johanna      & Haffner         & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t11 & NA                                   &    NA & Maxim        & Karnetzki       & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t12 & NA                                   &    NA & Ivo          & Maintz          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t13 & NA                                   &    NA & Lisa         & Mallis          & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t14 & NA                                   &    NA & Hannah       & Prawitz         & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t15 & NA                                   &    NA & Patrick      & Segelitz        & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t16 & http://orcid.org/0000-0001-5602-6080 & FALSE & Martin       & Seeger          & additional & Humboldt University of Berlin\\\\\n",
       "\t17 & NA                                   &    NA & Rune         & Linding         & additional & Humboldt-Universitaet zu Berlin\\\\\n",
       "\t18 & http://orcid.org/0000-0002-0567-7075 & FALSE & Edda         & Klipp           & additional & Humboldt University of Berlin\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 12 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & ORCID & authenticated-orcid & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <lgl> & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & http://orcid.org/0000-0002-2592-4168 & FALSE & Michael  & Bojdys     & first      & Humboldt University of Berlin\\\\\n",
       "\t2 & NA                                   &    NA & Jieyang  & Huang      & additional & Humboldt University of Berlin\\\\\n",
       "\t3 & NA                                   &    NA & Anna     & Urbanski   & additional & Leibniz-Institut für Polymerforschung Dresden (IPF) e. V.\\\\\n",
       "\t4 & NA                                   &    NA & Andréa   & Martin     & additional & Humboldt University of Berlin\\\\\n",
       "\t5 & NA                                   &    NA & Ranjit   & Kulkarni   & additional & Humboldt University of Berlin\\\\\n",
       "\t6 & http://orcid.org/0000-0002-7330-2451 & FALSE & Patrick  & Amsalem    & additional & Humboldt University of Berlin\\\\\n",
       "\t7 & NA                                   &    NA & Moritz   & Exner      & additional & Humboldt University of Berlin\\\\\n",
       "\t8 & NA                                   &    NA & Johannes & Müller     & additional & Humboldt University of Berlin\\\\\n",
       "\t9 & NA                                   &    NA & David    & Burmeister & additional & Humboldt University of Berlin\\\\\n",
       "\t10 & http://orcid.org/0000-0002-6042-6447 & FALSE & Norbert  & Koch       & additional & Humboldt University of Berlin\\\\\n",
       "\t11 & NA                                   &    NA & Nicola   & Pinna      & additional & Humboldt University of Berlin\\\\\n",
       "\t12 & NA                                   &    NA & Petra    & Uhlmann    & additional & Leibniz-Institut für Polymerforschung Dresden (IPF) e. V.\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 5 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Astrid & Rheinländer & first      & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t2 & Mario  & Lehmann     & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t3 & Anja   & Kunkel      & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t4 & Jörg   & Meier       & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t5 & Ulf    & Leser       & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 5 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Yannic    & Noller  & first      & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t2 & Hoang Lam & Nguyen  & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t3 & Minxing   & Tang    & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t4 & Timo      & Kehrer  & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t5 & Lars      & Grunske & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 5 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & ORCID & authenticated-orcid & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <lgl> & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & http://orcid.org/0000-0002-0519-6087 & FALSE & Michael   & Dürfeld & first      & Humboldt-Universität zu Berlin\\\\\n",
       "\t2 & NA                                   &    NA & Anika     & Schultz & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\t3 & NA                                   &    NA & Christian & Stein   & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\t4 & NA                                   &    NA & Benjamin  & Thomack & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\t5 & NA                                   &    NA & Nadia     & Zeissig & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 5 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & ORCID & authenticated-orcid & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <lgl> & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & http://orcid.org/0000-0002-7799-8409 & FALSE & Insa        & Wessels & first      & bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany             , Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t2 & NA                                   &    NA & Julia       & Rueß    & additional & bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t3 & NA                                   &    NA & Christopher & Gess    & additional & bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t4 & NA                                   &    NA & Wolfgang    & Deicke  & additional & bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t5 & NA                                   &    NA & Matthias    & Ziegler & additional & Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 3 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Frederick        & Dapilah & first      & IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t2 & Jonas Østergaard & Nielsen & additional & IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t3 & Cecilie          & Friis   & additional & IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 7 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & ORCID & authenticated-orcid & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <lgl> & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & http://orcid.org/0000-0001-7180-7109 & FALSE & Falk        & Mersmann   & first      & Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           \\\\\n",
       "\t2 & http://orcid.org/0000-0001-9941-6716 & FALSE & Theresa     & Domroes    & additional & Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           \\\\\n",
       "\t3 & NA                                   &    NA & Nikolaos    & Pentidis   & additional & Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           \\\\\n",
       "\t4 & NA                                   &    NA & Meng-Shiuan & Tsai       & additional & Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           \\\\\n",
       "\t5 & http://orcid.org/0000-0002-5720-3672 & FALSE & Sebastian   & Bohm       & additional & Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           \\\\\n",
       "\t6 & NA                                   &    NA & Arno        & Schroll    & additional & Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           \\\\\n",
       "\t7 & http://orcid.org/0000-0002-4985-0335 & FALSE & Adamantios  & Arampatzis & additional & Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany           \\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 4 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Steffen  & Volkenand & first      & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t2 & Guenther & Filler    & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t3 & Marlene  & Kionka    & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\t4 & Martin   & Odening   & additional & Humboldt-Universität zu Berlin, Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 4 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Yannic    & Noller & first      & Humboldt University of Berlin\\\\\n",
       "\t2 & Hoang Lam & Nguyen & additional & Humboldt University of Berlin\\\\\n",
       "\t3 & Minxing   & Tang   & additional & Humboldt University of Berlin\\\\\n",
       "\t4 & Timo      & Kehrer & additional & Humboldt University of Berlin\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 4 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Steffen & Hackbarth & first      & Humboldt-Universität zu Berlin\\\\\n",
       "\t2 & Michael & Pfitzner  & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\t3 & Jakob   & Pohl      & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\t4 & Beate   & Röder     & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 4 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Malte     & Belz       & first      & Humboldt-Universität zu Berlin\\\\\n",
       "\t2 & Simon     & Sauer      & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\t3 & Anke      & Lüdeling   & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\t4 & Christine & Mooshammer & additional & Humboldt-Universität zu Berlin\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 6 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Arne      & Hillebrand         & first      & Humboldt University Berlin, Molecular Genetics, Berlin, Germany\\\\\n",
       "\t2 & Joachim M & Matz               & additional & Humboldt University, Department of Molecular Parasitology, Berlin, Germany\\\\\n",
       "\t3 & Martin    & Almendinger        & additional & Humboldt University Berlin, Molecular Genetics, Berlin, Germany\\\\\n",
       "\t4 & Katja     & Müller             & additional & Humboldt University, Department of Molecular Parasitology, Berlin, Germany\\\\\n",
       "\t5 & Kai       & Matuschewski       & additional & Humboldt University, Department of Molecular Parasitology, Berlin, Germany\\\\\n",
       "\t6 & Christian & Schmitz-Linneweber & additional & Humboldt University Berlin, Molecular Genetics, Berlin, Germany\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 10 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & given & family & sequence & affiliation & ORCID & authenticated-orcid\\\\\n",
       "  & <chr> & <chr> & <chr> & <list> & <chr> & <lgl>\\\\\n",
       "\\hline\n",
       "\t1 & Cindy   & Ritter     & first      & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t2 & Eduard  & Maier      & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t3 & Undine  & Schneeweiß & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t4 & Tanja   & Wölk       & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t5 & Jean    & Simonnet   & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t6 & Safaa   & Malkawi    & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t7 & Lennart & Eigen      & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t8 & Elcin   & Tunckol    & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t9 & Leopold & Purkart    & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany & NA                                   &    NA\\\\\n",
       "\t10 & Michael & Brecht     & additional & Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany, NeuroCure Cluster of Excellence Humboldt-Universität zu Berlin  Berlin Germany                        & http://orcid.org/0000-0002-5387-0953 & FALSE\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 7 × 4\n",
       "\\begin{tabular}{r|llll}\n",
       "  & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & Sara         & ZAVAREH    & first      & Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit\\&auml;t Berlin\\\\\n",
       "\t2 & Andr\\&eacute; & HILGER     & additional & Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy\\\\\n",
       "\t3 & Kathrin      & HIRSELANDT & additional & Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit\\&auml;t Berlin\\\\\n",
       "\t4 & Oliver       & GOERKE     & additional & Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit\\&auml;t Berlin\\\\\n",
       "\t5 & Ingo         & MANKE      & additional & Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy\\\\\n",
       "\t6 & John         & BANHART    & additional & Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy\\\\\n",
       "\t7 & Aleksander   & GURLO      & additional & Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit\\&auml;t Berlin\\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\item A data.frame: 5 × 6\n",
       "\\begin{tabular}{r|llllll}\n",
       "  & ORCID & authenticated-orcid & given & family & sequence & affiliation\\\\\n",
       "  & <chr> & <lgl> & <chr> & <chr> & <chr> & <list>\\\\\n",
       "\\hline\n",
       "\t1 & http://orcid.org/0000-0002-5720-3672 & TRUE & Sebastian  & Bohm       & first      & Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           \\\\\n",
       "\t2 & http://orcid.org/0000-0001-7180-7109 & TRUE & Falk       & Mersmann   & additional & Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           \\\\\n",
       "\t3 & http://orcid.org/0000-0002-6577-5101 & TRUE & Alessandro & Santuz     & additional & Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           \\\\\n",
       "\t4 & NA                                   &   NA & Arno       & Schroll    & additional & Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           \\\\\n",
       "\t5 & http://orcid.org/0000-0002-4985-0335 & TRUE & Adamantios & Arampatzis & additional & Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany           \\\\\n",
       "\\end{tabular}\n",
       "\n",
       "\\end{enumerate}\n"
      ],
      "text/markdown": [
       "1. \n",
       "A data.frame: 19 × 6\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | Simon     | Schroeder    | first      | Charité-Universitätsmedizin Berlin | NA                                   |    NA |\n",
       "| 2 | Christin  | Mache        | additional | Robert Koch Institut | NA                                   |    NA |\n",
       "| 3 | Hannah    | Kleine-Weber | additional | German Primate Center | NA                                   |    NA |\n",
       "| 4 | Doreen    | Muth         | additional | Charité-Universitätsmedizin Berlin | NA                                   |    NA |\n",
       "| 5 | Victor    | Corman       | additional | Charité-Universitätsmedizin Berlin, corporate member of Freie Universit&amp;#x00E4;t Berlin, Humboldt-Universit&amp;#x00E4;t zu Berlin, and Berlin Institute of Health, Institute of Virology | http://orcid.org/0000-0002-3605-0136 | FALSE |\n",
       "| 6 | Diana     | Fatykhova    | additional | Charité-Universitätsmedizin Berlin | NA                                   |    NA |\n",
       "| 7 | Ziad Al   | Memish       | additional | Research and Innovation Department, King Saud Medical City, Ministry of Health &amp; College of Medicine, Alfaisal University, Riyadh, Kingdom of Saudi Arabia &amp; Hubert Department of Global Health, Rollins School of Public Health, Emory University | NA                                   |    NA |\n",
       "| 8 | Megan     | Stanifer     | additional | University Hospital Heidelberg and DKFZ | http://orcid.org/0000-0002-5606-1297 | FALSE |\n",
       "| 9 | Steeve    | Boulant      | additional | Department of Infectious Diseases, Heidelberg University Hospital | NA                                   |    NA |\n",
       "| 10 | Ronald    | Dijkman      | additional | University of Bern | http://orcid.org/0000-0003-0320-2743 | FALSE |\n",
       "| 11 | Anja      | Richter      | additional | Institute of Virology, Charité-Universitätsmedizin | NA                                   |    NA |\n",
       "| 12 | Stefan    | Eggeling     | additional | Vivantes Clinics Neukölln | NA                                   |    NA |\n",
       "| 13 | Andreas   | Hocke        | additional | Charité - Universitätsmedizin Berlin | NA                                   |    NA |\n",
       "| 14 | Stefan    | Hippenstiel  | additional | Charité - Universitätsmedizin Berlin | http://orcid.org/0000-0002-5146-1064 | FALSE |\n",
       "| 15 | Volker    | Thiel        | additional | Institute of Virology and Immunology, Bern, Switzerland | http://orcid.org/0000-0002-5783-0887 | FALSE |\n",
       "| 16 | Stefan    | Pöhlmann     | additional | German Primate Center - Leibniz Institute for Primate Research | http://orcid.org/0000-0001-6086-9136 | FALSE |\n",
       "| 17 | Thorsten  | Wolff        | additional | Robert Koch Institute | http://orcid.org/0000-0001-7688-236X | FALSE |\n",
       "| 18 | Marcel    | Müller       | additional | Institute of Virology, Charité - Universitätsmedizin Berlin, corporatemember of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute ofHealth | http://orcid.org/0000-0003-2242-5117 | FALSE |\n",
       "| 19 | Christian | Drosten      | additional | Charite - Universitätsmedizin Berlin | http://orcid.org/0000-0001-7923-0519 | FALSE |\n",
       "\n",
       "\n",
       "2. \n",
       "A data.frame: 3 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Angelika | T&lt;U+FFFD&gt;lle | first      | Department of Urology, Charit&lt;U+FFFD&gt;-Universit&lt;U+FFFD&gt;tsmedizin Berlin, D-10117 Berlin, Germany |\n",
       "| 2 | Laura    | Buckendahl   | additional | Department of Urology, Charit&lt;U+FFFD&gt;-Universit&lt;U+FFFD&gt;tsmedizin Berlin, D-10117 Berlin, Germany |\n",
       "| 3 | Klaus    | Jung         | additional | Department of Urology, Charit&lt;U+FFFD&gt;-Universit&lt;U+FFFD&gt;tsmedizin Berlin, D-10117 Berlin, Germany |\n",
       "\n",
       "\n",
       "3. \n",
       "A data.frame: 5 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Paris    | Carbone      | first      | KTH Royal Institute of Technology, Stockholm, Sweden |\n",
       "| 2 | Jonas    | Traub        | additional | Technische Universitat Berlin &amp;amp; DFKI, Berlin, Germany |\n",
       "| 3 | Asterios | Katsifodimos | additional | Technische Universitat Berlin &amp;amp; DFKI, Berlin, Germany |\n",
       "| 4 | Seif     | Haridi       | additional | KTH Royal Institute of Technology, Stockholm, Sweden |\n",
       "| 5 | Volker   | Markl        | additional | Technische Universitat Berlin &amp;amp; DFKI, Berlin, Germany |\n",
       "\n",
       "\n",
       "4. \n",
       "A data.frame: 18 × 6\n",
       "\n",
       "| <!--/--> | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | http://orcid.org/0000-0002-1456-5278 | FALSE | Björn        | Goldenbogen     | first      | Humboldt-Universitaet zu Berlin |\n",
       "| 2 | NA                                   |    NA | Stephan      | Adler           | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 3 | NA                                   |    NA | Oliver       | Bodeit          | additional | Humboldt University of Berlin |\n",
       "| 4 | NA                                   |    NA | Judith       | Wodke           | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 5 | NA                                   |    NA | Ximena       | Escalera-Fanjul | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 6 | http://orcid.org/0000-0002-4070-5393 | FALSE | Aviv         | Korman          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 7 | NA                                   |    NA | Maria        | Krantz          | additional | Humboldt University of Berlin |\n",
       "| 8 | NA                                   |    NA | Lasse        | Bonn            | additional | Humboldt University of Berlin |\n",
       "| 9 | NA                                   |    NA | Rafael Moran | Torres          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 10 | NA                                   |    NA | Johanna      | Haffner         | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 11 | NA                                   |    NA | Maxim        | Karnetzki       | additional | Humboldt University of Berlin |\n",
       "| 12 | NA                                   |    NA | Ivo          | Maintz          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 13 | NA                                   |    NA | Lisa         | Mallis          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 14 | NA                                   |    NA | Hannah       | Prawitz         | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 15 | NA                                   |    NA | Patrick      | Segelitz        | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 16 | http://orcid.org/0000-0001-5602-6080 | FALSE | Martin       | Seeger          | additional | Humboldt University of Berlin |\n",
       "| 17 | NA                                   |    NA | Rune         | Linding         | additional | Humboldt University of Berlin |\n",
       "| 18 | http://orcid.org/0000-0002-0567-7075 | FALSE | Edda         | Klipp           | additional | Humboldt University of Berlin |\n",
       "\n",
       "\n",
       "5. \n",
       "A data.frame: 18 × 6\n",
       "\n",
       "| <!--/--> | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | http://orcid.org/0000-0002-1456-5278 | FALSE | Björn        | Goldenbogen     | first      | Humboldt-Universitaet zu Berlin |\n",
       "| 2 | NA                                   |    NA | Stephan      | Adler           | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 3 | NA                                   |    NA | Oliver       | Bodeit          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 4 | NA                                   |    NA | Judith       | Wodke           | additional | Humboldt University of Berlin |\n",
       "| 5 | NA                                   |    NA | Ximena       | Escalera-Fanjul | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 6 | http://orcid.org/0000-0002-4070-5393 | FALSE | Aviv         | Korman          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 7 | NA                                   |    NA | Maria        | Krantz          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 8 | NA                                   |    NA | Lasse        | Bonn            | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 9 | NA                                   |    NA | Rafael Moran | Torres          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 10 | NA                                   |    NA | Johanna      | Haffner         | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 11 | NA                                   |    NA | Maxim        | Karnetzki       | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 12 | NA                                   |    NA | Ivo          | Maintz          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 13 | NA                                   |    NA | Lisa         | Mallis          | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 14 | NA                                   |    NA | Hannah       | Prawitz         | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 15 | NA                                   |    NA | Patrick      | Segelitz        | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 16 | http://orcid.org/0000-0001-5602-6080 | FALSE | Martin       | Seeger          | additional | Humboldt University of Berlin |\n",
       "| 17 | NA                                   |    NA | Rune         | Linding         | additional | Humboldt-Universitaet zu Berlin |\n",
       "| 18 | http://orcid.org/0000-0002-0567-7075 | FALSE | Edda         | Klipp           | additional | Humboldt University of Berlin |\n",
       "\n",
       "\n",
       "6. \n",
       "A data.frame: 12 × 6\n",
       "\n",
       "| <!--/--> | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | http://orcid.org/0000-0002-2592-4168 | FALSE | Michael  | Bojdys     | first      | Humboldt University of Berlin |\n",
       "| 2 | NA                                   |    NA | Jieyang  | Huang      | additional | Humboldt University of Berlin |\n",
       "| 3 | NA                                   |    NA | Anna     | Urbanski   | additional | Leibniz-Institut für Polymerforschung Dresden (IPF) e. V. |\n",
       "| 4 | NA                                   |    NA | Andréa   | Martin     | additional | Humboldt University of Berlin |\n",
       "| 5 | NA                                   |    NA | Ranjit   | Kulkarni   | additional | Humboldt University of Berlin |\n",
       "| 6 | http://orcid.org/0000-0002-7330-2451 | FALSE | Patrick  | Amsalem    | additional | Humboldt University of Berlin |\n",
       "| 7 | NA                                   |    NA | Moritz   | Exner      | additional | Humboldt University of Berlin |\n",
       "| 8 | NA                                   |    NA | Johannes | Müller     | additional | Humboldt University of Berlin |\n",
       "| 9 | NA                                   |    NA | David    | Burmeister | additional | Humboldt University of Berlin |\n",
       "| 10 | http://orcid.org/0000-0002-6042-6447 | FALSE | Norbert  | Koch       | additional | Humboldt University of Berlin |\n",
       "| 11 | NA                                   |    NA | Nicola   | Pinna      | additional | Humboldt University of Berlin |\n",
       "| 12 | NA                                   |    NA | Petra    | Uhlmann    | additional | Leibniz-Institut für Polymerforschung Dresden (IPF) e. V. |\n",
       "\n",
       "\n",
       "7. \n",
       "A data.frame: 5 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Astrid | Rheinländer | first      | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 2 | Mario  | Lehmann     | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 3 | Anja   | Kunkel      | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 4 | Jörg   | Meier       | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 5 | Ulf    | Leser       | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "\n",
       "\n",
       "8. \n",
       "A data.frame: 5 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Yannic    | Noller  | first      | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 2 | Hoang Lam | Nguyen  | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 3 | Minxing   | Tang    | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 4 | Timo      | Kehrer  | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 5 | Lars      | Grunske | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "\n",
       "\n",
       "9. \n",
       "A data.frame: 5 × 6\n",
       "\n",
       "| <!--/--> | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | http://orcid.org/0000-0002-0519-6087 | FALSE | Michael   | Dürfeld | first      | Humboldt-Universität zu Berlin |\n",
       "| 2 | NA                                   |    NA | Anika     | Schultz | additional | Humboldt-Universität zu Berlin |\n",
       "| 3 | NA                                   |    NA | Christian | Stein   | additional | Humboldt-Universität zu Berlin |\n",
       "| 4 | NA                                   |    NA | Benjamin  | Thomack | additional | Humboldt-Universität zu Berlin |\n",
       "| 5 | NA                                   |    NA | Nadia     | Zeissig | additional | Humboldt-Universität zu Berlin |\n",
       "\n",
       "\n",
       "10. \n",
       "A data.frame: 5 × 6\n",
       "\n",
       "| <!--/--> | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | http://orcid.org/0000-0002-7799-8409 | FALSE | Insa        | Wessels | first      | bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany             , Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 2 | NA                                   |    NA | Julia       | Rueß    | additional | bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 3 | NA                                   |    NA | Christopher | Gess    | additional | bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 4 | NA                                   |    NA | Wolfgang    | Deicke  | additional | bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 5 | NA                                   |    NA | Matthias    | Ziegler | additional | Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "\n",
       "\n",
       "11. \n",
       "A data.frame: 3 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Frederick        | Dapilah | first      | IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 2 | Jonas Østergaard | Nielsen | additional | IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 3 | Cecilie          | Friis   | additional | IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany          , Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "\n",
       "\n",
       "12. \n",
       "A data.frame: 7 × 6\n",
       "\n",
       "| <!--/--> | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | http://orcid.org/0000-0001-7180-7109 | FALSE | Falk        | Mersmann   | first      | Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany            |\n",
       "| 2 | http://orcid.org/0000-0001-9941-6716 | FALSE | Theresa     | Domroes    | additional | Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany            |\n",
       "| 3 | NA                                   |    NA | Nikolaos    | Pentidis   | additional | Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany            |\n",
       "| 4 | NA                                   |    NA | Meng-Shiuan | Tsai       | additional | Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany            |\n",
       "| 5 | http://orcid.org/0000-0002-5720-3672 | FALSE | Sebastian   | Bohm       | additional | Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany            |\n",
       "| 6 | NA                                   |    NA | Arno        | Schroll    | additional | Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany            |\n",
       "| 7 | http://orcid.org/0000-0002-4985-0335 | FALSE | Adamantios  | Arampatzis | additional | Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany            |\n",
       "\n",
       "\n",
       "13. \n",
       "A data.frame: 4 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Steffen  | Volkenand | first      | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 2 | Guenther | Filler    | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 3 | Marlene  | Kionka    | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "| 4 | Martin   | Odening   | additional | Humboldt-Universität zu Berlin, Berlin, Germany |\n",
       "\n",
       "\n",
       "14. \n",
       "A data.frame: 4 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Yannic    | Noller | first      | Humboldt University of Berlin |\n",
       "| 2 | Hoang Lam | Nguyen | additional | Humboldt University of Berlin |\n",
       "| 3 | Minxing   | Tang   | additional | Humboldt University of Berlin |\n",
       "| 4 | Timo      | Kehrer | additional | Humboldt University of Berlin |\n",
       "\n",
       "\n",
       "15. \n",
       "A data.frame: 4 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Steffen | Hackbarth | first      | Humboldt-Universität zu Berlin |\n",
       "| 2 | Michael | Pfitzner  | additional | Humboldt-Universität zu Berlin |\n",
       "| 3 | Jakob   | Pohl      | additional | Humboldt-Universität zu Berlin |\n",
       "| 4 | Beate   | Röder     | additional | Humboldt-Universität zu Berlin |\n",
       "\n",
       "\n",
       "16. \n",
       "A data.frame: 4 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Malte     | Belz       | first      | Humboldt-Universität zu Berlin |\n",
       "| 2 | Simon     | Sauer      | additional | Humboldt-Universität zu Berlin |\n",
       "| 3 | Anke      | Lüdeling   | additional | Humboldt-Universität zu Berlin |\n",
       "| 4 | Christine | Mooshammer | additional | Humboldt-Universität zu Berlin |\n",
       "\n",
       "\n",
       "17. \n",
       "A data.frame: 6 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Arne      | Hillebrand         | first      | Humboldt University Berlin, Molecular Genetics, Berlin, Germany |\n",
       "| 2 | Joachim M | Matz               | additional | Humboldt University, Department of Molecular Parasitology, Berlin, Germany |\n",
       "| 3 | Martin    | Almendinger        | additional | Humboldt University Berlin, Molecular Genetics, Berlin, Germany |\n",
       "| 4 | Katja     | Müller             | additional | Humboldt University, Department of Molecular Parasitology, Berlin, Germany |\n",
       "| 5 | Kai       | Matuschewski       | additional | Humboldt University, Department of Molecular Parasitology, Berlin, Germany |\n",
       "| 6 | Christian | Schmitz-Linneweber | additional | Humboldt University Berlin, Molecular Genetics, Berlin, Germany |\n",
       "\n",
       "\n",
       "18. \n",
       "A data.frame: 10 × 6\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | Cindy   | Ritter     | first      | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 2 | Eduard  | Maier      | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 3 | Undine  | Schneeweiß | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 4 | Tanja   | Wölk       | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 5 | Jean    | Simonnet   | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 6 | Safaa   | Malkawi    | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 7 | Lennart | Eigen      | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 8 | Elcin   | Tunckol    | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 9 | Leopold | Purkart    | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany | NA                                   |    NA |\n",
       "| 10 | Michael | Brecht     | additional | Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany, NeuroCure Cluster of Excellence Humboldt-Universität zu Berlin  Berlin Germany                        | http://orcid.org/0000-0002-5387-0953 | FALSE |\n",
       "\n",
       "\n",
       "19. \n",
       "A data.frame: 7 × 4\n",
       "\n",
       "| <!--/--> | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|\n",
       "| 1 | Sara         | ZAVAREH    | first      | Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin |\n",
       "| 2 | Andr&amp;eacute; | HILGER     | additional | Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy |\n",
       "| 3 | Kathrin      | HIRSELANDT | additional | Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin |\n",
       "| 4 | Oliver       | GOERKE     | additional | Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin |\n",
       "| 5 | Ingo         | MANKE      | additional | Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy |\n",
       "| 6 | John         | BANHART    | additional | Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy |\n",
       "| 7 | Aleksander   | GURLO      | additional | Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&amp;auml;t Berlin |\n",
       "\n",
       "\n",
       "20. \n",
       "A data.frame: 5 × 6\n",
       "\n",
       "| <!--/--> | ORCID &lt;chr&gt; | authenticated-orcid &lt;lgl&gt; | given &lt;chr&gt; | family &lt;chr&gt; | sequence &lt;chr&gt; | affiliation &lt;list&gt; |\n",
       "|---|---|---|---|---|---|---|\n",
       "| 1 | http://orcid.org/0000-0002-5720-3672 | TRUE | Sebastian  | Bohm       | first      | Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany            |\n",
       "| 2 | http://orcid.org/0000-0001-7180-7109 | TRUE | Falk       | Mersmann   | additional | Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany            |\n",
       "| 3 | http://orcid.org/0000-0002-6577-5101 | TRUE | Alessandro | Santuz     | additional | Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany            |\n",
       "| 4 | NA                                   |   NA | Arno       | Schroll    | additional | Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany            |\n",
       "| 5 | http://orcid.org/0000-0002-4985-0335 | TRUE | Adamantios | Arampatzis | additional | Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany            |\n",
       "\n",
       "\n",
       "\n",
       "\n"
      ],
      "text/plain": [
       "[[1]]\n",
       "       given       family   sequence\n",
       "1      Simon    Schroeder      first\n",
       "2   Christin        Mache additional\n",
       "3     Hannah Kleine-Weber additional\n",
       "4     Doreen         Muth additional\n",
       "5     Victor       Corman additional\n",
       "6      Diana    Fatykhova additional\n",
       "7    Ziad Al       Memish additional\n",
       "8      Megan     Stanifer additional\n",
       "9     Steeve      Boulant additional\n",
       "10    Ronald      Dijkman additional\n",
       "11      Anja      Richter additional\n",
       "12    Stefan     Eggeling additional\n",
       "13   Andreas        Hocke additional\n",
       "14    Stefan  Hippenstiel additional\n",
       "15    Volker        Thiel additional\n",
       "16    Stefan     Pöhlmann additional\n",
       "17  Thorsten        Wolff additional\n",
       "18    Marcel       Müller additional\n",
       "19 Christian      Drosten additional\n",
       "                                                                                                                                                                                                                                          affiliation\n",
       "1                                                                                                                                                                                                                  Charité-Universitätsmedizin Berlin\n",
       "2                                                                                                                                                                                                                                Robert Koch Institut\n",
       "3                                                                                                                                                                                                                               German Primate Center\n",
       "4                                                                                                                                                                                                                  Charité-Universitätsmedizin Berlin\n",
       "5                                                               Charité-Universitätsmedizin Berlin, corporate member of Freie Universit&#x00E4;t Berlin, Humboldt-Universit&#x00E4;t zu Berlin, and Berlin Institute of Health, Institute of Virology\n",
       "6                                                                                                                                                                                                                  Charité-Universitätsmedizin Berlin\n",
       "7  Research and Innovation Department, King Saud Medical City, Ministry of Health & College of Medicine, Alfaisal University, Riyadh, Kingdom of Saudi Arabia & Hubert Department of Global Health, Rollins School of Public Health, Emory University\n",
       "8                                                                                                                                                                                                             University Hospital Heidelberg and DKFZ\n",
       "9                                                                                                                                                                                   Department of Infectious Diseases, Heidelberg University Hospital\n",
       "10                                                                                                                                                                                                                                 University of Bern\n",
       "11                                                                                                                                                                                                 Institute of Virology, Charité-Universitätsmedizin\n",
       "12                                                                                                                                                                                                                          Vivantes Clinics Neukölln\n",
       "13                                                                                                                                                                                                               Charité - Universitätsmedizin Berlin\n",
       "14                                                                                                                                                                                                               Charité - Universitätsmedizin Berlin\n",
       "15                                                                                                                                                                                            Institute of Virology and Immunology, Bern, Switzerland\n",
       "16                                                                                                                                                                                     German Primate Center - Leibniz Institute for Primate Research\n",
       "17                                                                                                                                                                                                                              Robert Koch Institute\n",
       "18                                                                            Institute of Virology, Charité - Universitätsmedizin Berlin, corporatemember of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute ofHealth\n",
       "19                                                                                                                                                                                                               Charite - Universitätsmedizin Berlin\n",
       "                                  ORCID authenticated-orcid\n",
       "1                                  <NA>                  NA\n",
       "2                                  <NA>                  NA\n",
       "3                                  <NA>                  NA\n",
       "4                                  <NA>                  NA\n",
       "5  http://orcid.org/0000-0002-3605-0136               FALSE\n",
       "6                                  <NA>                  NA\n",
       "7                                  <NA>                  NA\n",
       "8  http://orcid.org/0000-0002-5606-1297               FALSE\n",
       "9                                  <NA>                  NA\n",
       "10 http://orcid.org/0000-0003-0320-2743               FALSE\n",
       "11                                 <NA>                  NA\n",
       "12                                 <NA>                  NA\n",
       "13                                 <NA>                  NA\n",
       "14 http://orcid.org/0000-0002-5146-1064               FALSE\n",
       "15 http://orcid.org/0000-0002-5783-0887               FALSE\n",
       "16 http://orcid.org/0000-0001-6086-9136               FALSE\n",
       "17 http://orcid.org/0000-0001-7688-236X               FALSE\n",
       "18 http://orcid.org/0000-0003-2242-5117               FALSE\n",
       "19 http://orcid.org/0000-0001-7923-0519               FALSE\n",
       "\n",
       "[[2]]\n",
       "     given       family   sequence\n",
       "1 Angelika T<U+FFFD>lle      first\n",
       "2    Laura   Buckendahl additional\n",
       "3    Klaus         Jung additional\n",
       "                                                                                       affiliation\n",
       "1 Department of Urology, Charit<U+FFFD>-Universit<U+FFFD>tsmedizin Berlin, D-10117 Berlin, Germany\n",
       "2 Department of Urology, Charit<U+FFFD>-Universit<U+FFFD>tsmedizin Berlin, D-10117 Berlin, Germany\n",
       "3 Department of Urology, Charit<U+FFFD>-Universit<U+FFFD>tsmedizin Berlin, D-10117 Berlin, Germany\n",
       "\n",
       "[[3]]\n",
       "     given       family   sequence\n",
       "1    Paris      Carbone      first\n",
       "2    Jonas        Traub additional\n",
       "3 Asterios Katsifodimos additional\n",
       "4     Seif       Haridi additional\n",
       "5   Volker        Markl additional\n",
       "                                                    affiliation\n",
       "1          KTH Royal Institute of Technology, Stockholm, Sweden\n",
       "2 Technische Universit\\177at Berlin &amp; DFKI, Berlin, Germany\n",
       "3 Technische Universit\\177at Berlin &amp; DFKI, Berlin, Germany\n",
       "4          KTH Royal Institute of Technology, Stockholm, Sweden\n",
       "5 Technische Universit\\177at Berlin &amp; DFKI, Berlin, Germany\n",
       "\n",
       "[[4]]\n",
       "                                  ORCID authenticated-orcid        given\n",
       "1  http://orcid.org/0000-0002-1456-5278               FALSE        Björn\n",
       "2                                  <NA>                  NA      Stephan\n",
       "3                                  <NA>                  NA       Oliver\n",
       "4                                  <NA>                  NA       Judith\n",
       "5                                  <NA>                  NA       Ximena\n",
       "6  http://orcid.org/0000-0002-4070-5393               FALSE         Aviv\n",
       "7                                  <NA>                  NA        Maria\n",
       "8                                  <NA>                  NA        Lasse\n",
       "9                                  <NA>                  NA Rafael Moran\n",
       "10                                 <NA>                  NA      Johanna\n",
       "11                                 <NA>                  NA        Maxim\n",
       "12                                 <NA>                  NA          Ivo\n",
       "13                                 <NA>                  NA         Lisa\n",
       "14                                 <NA>                  NA       Hannah\n",
       "15                                 <NA>                  NA      Patrick\n",
       "16 http://orcid.org/0000-0001-5602-6080               FALSE       Martin\n",
       "17                                 <NA>                  NA         Rune\n",
       "18 http://orcid.org/0000-0002-0567-7075               FALSE         Edda\n",
       "            family   sequence                     affiliation\n",
       "1      Goldenbogen      first Humboldt-Universitaet zu Berlin\n",
       "2            Adler additional Humboldt-Universitaet zu Berlin\n",
       "3           Bodeit additional   Humboldt University of Berlin\n",
       "4            Wodke additional Humboldt-Universitaet zu Berlin\n",
       "5  Escalera-Fanjul additional Humboldt-Universitaet zu Berlin\n",
       "6           Korman additional Humboldt-Universitaet zu Berlin\n",
       "7           Krantz additional   Humboldt University of Berlin\n",
       "8             Bonn additional   Humboldt University of Berlin\n",
       "9           Torres additional Humboldt-Universitaet zu Berlin\n",
       "10         Haffner additional Humboldt-Universitaet zu Berlin\n",
       "11       Karnetzki additional   Humboldt University of Berlin\n",
       "12          Maintz additional Humboldt-Universitaet zu Berlin\n",
       "13          Mallis additional Humboldt-Universitaet zu Berlin\n",
       "14         Prawitz additional Humboldt-Universitaet zu Berlin\n",
       "15        Segelitz additional Humboldt-Universitaet zu Berlin\n",
       "16          Seeger additional   Humboldt University of Berlin\n",
       "17         Linding additional   Humboldt University of Berlin\n",
       "18           Klipp additional   Humboldt University of Berlin\n",
       "\n",
       "[[5]]\n",
       "                                  ORCID authenticated-orcid        given\n",
       "1  http://orcid.org/0000-0002-1456-5278               FALSE        Björn\n",
       "2                                  <NA>                  NA      Stephan\n",
       "3                                  <NA>                  NA       Oliver\n",
       "4                                  <NA>                  NA       Judith\n",
       "5                                  <NA>                  NA       Ximena\n",
       "6  http://orcid.org/0000-0002-4070-5393               FALSE         Aviv\n",
       "7                                  <NA>                  NA        Maria\n",
       "8                                  <NA>                  NA        Lasse\n",
       "9                                  <NA>                  NA Rafael Moran\n",
       "10                                 <NA>                  NA      Johanna\n",
       "11                                 <NA>                  NA        Maxim\n",
       "12                                 <NA>                  NA          Ivo\n",
       "13                                 <NA>                  NA         Lisa\n",
       "14                                 <NA>                  NA       Hannah\n",
       "15                                 <NA>                  NA      Patrick\n",
       "16 http://orcid.org/0000-0001-5602-6080               FALSE       Martin\n",
       "17                                 <NA>                  NA         Rune\n",
       "18 http://orcid.org/0000-0002-0567-7075               FALSE         Edda\n",
       "            family   sequence                     affiliation\n",
       "1      Goldenbogen      first Humboldt-Universitaet zu Berlin\n",
       "2            Adler additional Humboldt-Universitaet zu Berlin\n",
       "3           Bodeit additional Humboldt-Universitaet zu Berlin\n",
       "4            Wodke additional   Humboldt University of Berlin\n",
       "5  Escalera-Fanjul additional Humboldt-Universitaet zu Berlin\n",
       "6           Korman additional Humboldt-Universitaet zu Berlin\n",
       "7           Krantz additional Humboldt-Universitaet zu Berlin\n",
       "8             Bonn additional Humboldt-Universitaet zu Berlin\n",
       "9           Torres additional Humboldt-Universitaet zu Berlin\n",
       "10         Haffner additional Humboldt-Universitaet zu Berlin\n",
       "11       Karnetzki additional Humboldt-Universitaet zu Berlin\n",
       "12          Maintz additional Humboldt-Universitaet zu Berlin\n",
       "13          Mallis additional Humboldt-Universitaet zu Berlin\n",
       "14         Prawitz additional Humboldt-Universitaet zu Berlin\n",
       "15        Segelitz additional Humboldt-Universitaet zu Berlin\n",
       "16          Seeger additional   Humboldt University of Berlin\n",
       "17         Linding additional Humboldt-Universitaet zu Berlin\n",
       "18           Klipp additional   Humboldt University of Berlin\n",
       "\n",
       "[[6]]\n",
       "                                  ORCID authenticated-orcid    given     family\n",
       "1  http://orcid.org/0000-0002-2592-4168               FALSE  Michael     Bojdys\n",
       "2                                  <NA>                  NA  Jieyang      Huang\n",
       "3                                  <NA>                  NA     Anna   Urbanski\n",
       "4                                  <NA>                  NA   Andréa     Martin\n",
       "5                                  <NA>                  NA   Ranjit   Kulkarni\n",
       "6  http://orcid.org/0000-0002-7330-2451               FALSE  Patrick    Amsalem\n",
       "7                                  <NA>                  NA   Moritz      Exner\n",
       "8                                  <NA>                  NA Johannes     Müller\n",
       "9                                  <NA>                  NA    David Burmeister\n",
       "10 http://orcid.org/0000-0002-6042-6447               FALSE  Norbert       Koch\n",
       "11                                 <NA>                  NA   Nicola      Pinna\n",
       "12                                 <NA>                  NA    Petra    Uhlmann\n",
       "     sequence                                               affiliation\n",
       "1       first                             Humboldt University of Berlin\n",
       "2  additional                             Humboldt University of Berlin\n",
       "3  additional Leibniz-Institut für Polymerforschung Dresden (IPF) e. V.\n",
       "4  additional                             Humboldt University of Berlin\n",
       "5  additional                             Humboldt University of Berlin\n",
       "6  additional                             Humboldt University of Berlin\n",
       "7  additional                             Humboldt University of Berlin\n",
       "8  additional                             Humboldt University of Berlin\n",
       "9  additional                             Humboldt University of Berlin\n",
       "10 additional                             Humboldt University of Berlin\n",
       "11 additional                             Humboldt University of Berlin\n",
       "12 additional Leibniz-Institut für Polymerforschung Dresden (IPF) e. V.\n",
       "\n",
       "[[7]]\n",
       "   given      family   sequence                                     affiliation\n",
       "1 Astrid Rheinländer      first Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "2  Mario     Lehmann additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "3   Anja      Kunkel additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "4   Jörg       Meier additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "5    Ulf       Leser additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "\n",
       "[[8]]\n",
       "      given  family   sequence                                     affiliation\n",
       "1    Yannic  Noller      first Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "2 Hoang Lam  Nguyen additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "3   Minxing    Tang additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "4      Timo  Kehrer additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "5      Lars Grunske additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "\n",
       "[[9]]\n",
       "                                 ORCID authenticated-orcid     given  family\n",
       "1 http://orcid.org/0000-0002-0519-6087               FALSE   Michael Dürfeld\n",
       "2                                 <NA>                  NA     Anika Schultz\n",
       "3                                 <NA>                  NA Christian   Stein\n",
       "4                                 <NA>                  NA  Benjamin Thomack\n",
       "5                                 <NA>                  NA     Nadia Zeissig\n",
       "    sequence                    affiliation\n",
       "1      first Humboldt-Universität zu Berlin\n",
       "2 additional Humboldt-Universität zu Berlin\n",
       "3 additional Humboldt-Universität zu Berlin\n",
       "4 additional Humboldt-Universität zu Berlin\n",
       "5 additional Humboldt-Universität zu Berlin\n",
       "\n",
       "[[10]]\n",
       "                                 ORCID authenticated-orcid       given  family\n",
       "1 http://orcid.org/0000-0002-7799-8409               FALSE        Insa Wessels\n",
       "2                                 <NA>                  NA       Julia    Rueß\n",
       "3                                 <NA>                  NA Christopher    Gess\n",
       "4                                 <NA>                  NA    Wolfgang  Deicke\n",
       "5                                 <NA>                  NA    Matthias Ziegler\n",
       "    sequence\n",
       "1      first\n",
       "2 additional\n",
       "3 additional\n",
       "4 additional\n",
       "5 additional\n",
       "                                                                                                                              affiliation\n",
       "1 bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany, Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "2                                                                            bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "3                                                                            bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "4                                                                            bologna.lab, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "5                                                               Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "\n",
       "[[11]]\n",
       "             given  family   sequence\n",
       "1        Frederick Dapilah      first\n",
       "2 Jonas Østergaard Nielsen additional\n",
       "3          Cecilie   Friis additional\n",
       "                                                                                                                         affiliation\n",
       "1 IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany, Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "2 IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany, Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "3 IRI-THESys, Humboldt-Universität zu Berlin, Berlin, Germany, Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "\n",
       "[[12]]\n",
       "                                 ORCID authenticated-orcid       given\n",
       "1 http://orcid.org/0000-0001-7180-7109               FALSE        Falk\n",
       "2 http://orcid.org/0000-0001-9941-6716               FALSE     Theresa\n",
       "3                                 <NA>                  NA    Nikolaos\n",
       "4                                 <NA>                  NA Meng-Shiuan\n",
       "5 http://orcid.org/0000-0002-5720-3672               FALSE   Sebastian\n",
       "6                                 <NA>                  NA        Arno\n",
       "7 http://orcid.org/0000-0002-4985-0335               FALSE  Adamantios\n",
       "      family   sequence\n",
       "1   Mersmann      first\n",
       "2    Domroes additional\n",
       "3   Pentidis additional\n",
       "4       Tsai additional\n",
       "5       Bohm additional\n",
       "6    Schroll additional\n",
       "7 Arampatzis additional\n",
       "                                                                                                                                                                  affiliation\n",
       "1 Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany\n",
       "2 Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany\n",
       "3 Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany\n",
       "4 Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany\n",
       "5 Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany\n",
       "6 Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany\n",
       "7 Department of Training and Movement Sciences Humboldt-Universität zu Berlin Berlin Germany, Berlin School of Movement Science Humboldt-Universität zu Berlin Berlin Germany\n",
       "\n",
       "[[13]]\n",
       "     given    family   sequence                                     affiliation\n",
       "1  Steffen Volkenand      first Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "2 Guenther    Filler additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "3  Marlene    Kionka additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "4   Martin   Odening additional Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "\n",
       "[[14]]\n",
       "      given family   sequence                   affiliation\n",
       "1    Yannic Noller      first Humboldt University of Berlin\n",
       "2 Hoang Lam Nguyen additional Humboldt University of Berlin\n",
       "3   Minxing   Tang additional Humboldt University of Berlin\n",
       "4      Timo Kehrer additional Humboldt University of Berlin\n",
       "\n",
       "[[15]]\n",
       "    given    family   sequence                    affiliation\n",
       "1 Steffen Hackbarth      first Humboldt-Universität zu Berlin\n",
       "2 Michael  Pfitzner additional Humboldt-Universität zu Berlin\n",
       "3   Jakob      Pohl additional Humboldt-Universität zu Berlin\n",
       "4   Beate     Röder additional Humboldt-Universität zu Berlin\n",
       "\n",
       "[[16]]\n",
       "      given     family   sequence                    affiliation\n",
       "1     Malte       Belz      first Humboldt-Universität zu Berlin\n",
       "2     Simon      Sauer additional Humboldt-Universität zu Berlin\n",
       "3      Anke   Lüdeling additional Humboldt-Universität zu Berlin\n",
       "4 Christine Mooshammer additional Humboldt-Universität zu Berlin\n",
       "\n",
       "[[17]]\n",
       "      given             family   sequence\n",
       "1      Arne         Hillebrand      first\n",
       "2 Joachim M               Matz additional\n",
       "3    Martin        Almendinger additional\n",
       "4     Katja             Müller additional\n",
       "5       Kai       Matuschewski additional\n",
       "6 Christian Schmitz-Linneweber additional\n",
       "                                                                 affiliation\n",
       "1            Humboldt University Berlin, Molecular Genetics, Berlin, Germany\n",
       "2 Humboldt University, Department of Molecular Parasitology, Berlin, Germany\n",
       "3            Humboldt University Berlin, Molecular Genetics, Berlin, Germany\n",
       "4 Humboldt University, Department of Molecular Parasitology, Berlin, Germany\n",
       "5 Humboldt University, Department of Molecular Parasitology, Berlin, Germany\n",
       "6            Humboldt University Berlin, Molecular Genetics, Berlin, Germany\n",
       "\n",
       "[[18]]\n",
       "     given     family   sequence\n",
       "1    Cindy     Ritter      first\n",
       "2   Eduard      Maier additional\n",
       "3   Undine Schneeweiß additional\n",
       "4    Tanja       Wölk additional\n",
       "5     Jean   Simonnet additional\n",
       "6    Safaa    Malkawi additional\n",
       "7  Lennart      Eigen additional\n",
       "8    Elcin    Tunckol additional\n",
       "9  Leopold    Purkart additional\n",
       "10 Michael     Brecht additional\n",
       "                                                                                                                                                                             affiliation\n",
       "1                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "2                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "3                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "4                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "5                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "6                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "7                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "8                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "9                                                                                  Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany\n",
       "10 Bernstein Center for Computational Neuroscience Berlin Humboldt-Universität zu Berlin  Berlin Germany, NeuroCure Cluster of Excellence Humboldt-Universität zu Berlin  Berlin Germany\n",
       "                                  ORCID authenticated-orcid\n",
       "1                                  <NA>                  NA\n",
       "2                                  <NA>                  NA\n",
       "3                                  <NA>                  NA\n",
       "4                                  <NA>                  NA\n",
       "5                                  <NA>                  NA\n",
       "6                                  <NA>                  NA\n",
       "7                                  <NA>                  NA\n",
       "8                                  <NA>                  NA\n",
       "9                                  <NA>                  NA\n",
       "10 http://orcid.org/0000-0002-5387-0953               FALSE\n",
       "\n",
       "[[19]]\n",
       "         given     family   sequence\n",
       "1         Sara    ZAVAREH      first\n",
       "2 Andr&eacute;     HILGER additional\n",
       "3      Kathrin HIRSELANDT additional\n",
       "4       Oliver     GOERKE additional\n",
       "5         Ingo      MANKE additional\n",
       "6         John    BANHART additional\n",
       "7   Aleksander      GURLO additional\n",
       "                                                                                               affiliation\n",
       "1 Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&auml;t Berlin\n",
       "2                         Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy\n",
       "3 Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&auml;t Berlin\n",
       "4 Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&auml;t Berlin\n",
       "5                         Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy\n",
       "6                         Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy\n",
       "7 Fachgebiet Keramische Werkstoffe/Chair of Advanced Ceramic Materials, Technische Universit&auml;t Berlin\n",
       "\n",
       "[[20]]\n",
       "                                 ORCID authenticated-orcid      given\n",
       "1 http://orcid.org/0000-0002-5720-3672                TRUE  Sebastian\n",
       "2 http://orcid.org/0000-0001-7180-7109                TRUE       Falk\n",
       "3 http://orcid.org/0000-0002-6577-5101                TRUE Alessandro\n",
       "4                                 <NA>                  NA       Arno\n",
       "5 http://orcid.org/0000-0002-4985-0335                TRUE Adamantios\n",
       "      family   sequence\n",
       "1       Bohm      first\n",
       "2   Mersmann additional\n",
       "3     Santuz additional\n",
       "4    Schroll additional\n",
       "5 Arampatzis additional\n",
       "                                                                                                                                                                        affiliation\n",
       "1 Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "2 Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "3 Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "4 Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany\n",
       "5 Humboldt-Universität zu Berlin, Department of Training and Movement Sciences, Berlin, Germany, Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "# access the results by subsetting\n",
    "results$message$items$DOI\n",
    "results$message$items$published\n",
    "results$message$items$type\n",
    "results$message$items$author"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "You can find out how many items match your query by accessing*total-results* - in this case, we have more than 51,000 matches!"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "51568"
      ],
      "text/latex": [
       "51568"
      ],
      "text/markdown": [
       "51568"
      ],
      "text/plain": [
       "[1] 51568"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "# total number ot items matching the query\n",
    "results$message$`total-results`"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Step 5: retrieving all DOIs matching the query\n",
    "\n",
    "**To reduce the load on the crossref API, we will not execute this step in the workshop - I will provide you with the data necessary to proceed.**\n",
    "\n",
    "To retrieve the information on all matches, we have to iterate through the results, which by default are returned in sets of 20. For this purpose, crossref offers *cursors*. They work like this: to your first query, you add the *cursor* parameter with the value \" \\* \". Alongside the results, crossref returns a *next-cursor* field. You can use this value to access the next set of 20 items, and so on.\n",
    "\n",
    "We can implement this in R using a *while loop*, a useful form of iteration if you don't exactly know how long a sequence is. \n",
    "\n",
    "In the example below, we first add \"&cursor=\\*\" to the first of our query URLs, pass that URL to *fromJSON*, and store the result in *results*. Next, we extract the DOIs, publication year (since this is a data frame, extraction is a little more complex), resource type and affiliation (this case is also more complex and includes [condition handling](http://adv-r.had.co.nz/Exceptions-Debugging.html#condition-handling)) and store them in a data frame. We store the next cursor in *next_cursor*.\n",
    "\n",
    "We then initiate a while loop that will repeat itself until a condition is met. Here, the loop is repeated until the number of rows (= items already retrieved) is no longer smaller than the total number of items matching the query. Within the loop, we will use *rbind* to add the new results to the data frame we previously created for storing DOIs, publication year and resource type.\n",
    "\n",
    "The result also includes affiliation information, which you could use to further narrow down your sample, for example by excluding publications that are affiliated with Charité Universitätsmedizin Berlin. In this workshop, we continue with the full dataset."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "# DO NOT RUN THIS!\n",
    "\n",
    "# first request with \"cursor=*\"\"\n",
    "#results <- fromJSON(paste0(\"https://api.crossref.org/works?query.affiliation=humboldt+universit+berlin&filter=from-pub-date:2022-01-01&cursor=\", \"*&mailto=janedoe@example.org\"))\n",
    "# extract and store information in a data frame\n",
    "#DF <- data.frame(c(DOIs = list(results$message$items$DOI),\n",
    "#             publication_year = list(unlist(map(results$message$items$published$`date-parts`, 1))),\n",
    "#             resource_type = list(results$message$items$type)))\n",
    "# store next cursor\n",
    "#next_cursor <- results$message$`next-cursor`\n",
    "\n",
    "# iterate through the results until the condition is met; append new results with each iteration\n",
    "#while (nrow(DF) < results$message$`total-results`) {\n",
    "#  results <- fromJSON(paste0(\"https://api.crossref.org/works?query.affiliation=humboldt+universit+berlin&filter=from-pub-date:2022-01-01&cursor=\", next_cursor, \"&mailto=janedoe@example.org\"))\n",
    "#  DF <- rbind(DF, data.frame(c(DOIs = list(results$message$items$DOI),\n",
    "#                     publication_year = list(unlist(map(results$message$items$published$`date-parts`, 1))),\n",
    "#                     resource_type = list(results$message$items$type))))\n",
    "#  next_cursor <- results$message$`next-cursor`\n",
    "#}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### EXERCISE: try the package rcrossref\n",
    "\n",
    "*rcrossref* is an R package specifically for using the crossref API. Crossref holds a lot of metadata about various aspects of scholarly publication. For example, crossref offers citation counts for works, based on reference matching within its holdings. \n",
    "\n",
    "The availability of this information depends on members choosing to add references upon metadata creation. Citation information is also less complete compared to other bibliometric databases. However, opening up citation information is a major issue in bibliometric research, and therefore will hopefully grow in the future.\n",
    "\n",
    "The function *cr_citation_count* works in a similar way to what we did above. The function takes a vector of dois, and returns a dataframe with citation counts provided by crossref.\n",
    "\n",
    "Below, we first install and load *rcrossref*. Then, we load a sample of 50 DOIs and retrieve citation counts from crossref.\n",
    "\n",
    "**Have a look at the result.**\n",
    "* What is the average citation count of this sample?\n",
    "* What publication has the highest citation count?\n",
    "* Try to access that publication. Can you open and read it?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Warning message:\n",
      "\"package 'rcrossref' was built under R version 4.0.5\"\n"
     ]
    }
   ],
   "source": [
    "#install.packages(\"rcrossref\")\n",
    "library(rcrossref)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "# import the sample DOIs\n",
    "DOI_sample <- read.csv(\"../data/DOI_sample.csv\", row.names = \"X\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "                                                           doi count\n",
      "1                                           10.3139/104.111575     2\n",
      "2                                           10.3139/104.111560     1\n",
      "3                                           10.3139/104.111574     0\n",
      "4                                               10.3852/15-254     7\n",
      "5                                           10.1130/ges02032.1     4\n",
      "6                                       10.1055/s-0037-1598699     1\n",
      "7                                       10.1055/s-0036-1594189     0\n",
      "8                                      10.1515/cdbme-2017-0005     8\n",
      "9                                        10.1515/zwf-2021-0045     0\n",
      "10                                    10.1177/0269881115609072    73\n",
      "11                                      10.1002/chem.201603098    14\n",
      "12                                      10.1002/ange.201803136    40\n",
      "13                                      10.1055/s-0038-1668731     0\n",
      "14                                    10.1093/eurheartj/ehz540     0\n",
      "15                               10.1093/eurheartj/ehz748.0501     0\n",
      "16                                            10.1002/pip.2725    17\n",
      "17                                   10.22331/q-2021-03-23-417     2\n",
      "18                           10.1200/jco.2016.34.15_suppl.5005     1\n",
      "19                                          10.3139/104.111561     2\n",
      "20                                          10.3139/104.112098     0\n",
      "21                                          10.3139/104.111918     1\n",
      "22                                          10.1111/apha.13701     0\n",
      "23                                      10.1055/s-0038-1671328     0\n",
      "24 10.1164/ajrccm-conference.2020.201.1_meetingabstracts.a5255     0\n",
      "25                                 10.1563/aaid-joi-d-16-00065     5\n",
      "26                                      10.1055/s-0039-1693665     0\n",
      "27                                    10.1021/acsomega.9b04371     7\n",
      "28                                         10.1055/a-0829-6580     1\n",
      "29                                   10.1109/eptc.2017.8277550     1\n",
      "30                                10.1182/blood-2018-99-116652     1\n",
      "31                                     10.1145/3341105.3373909     7\n",
      "32                                          10.1111/head.13278     1\n",
      "33                                      10.25039/x44.2017.op39     0\n",
      "34                             10.1200/jco.2017.35.7_suppl.134     0\n",
      "35                                    10.1515/bejeap-2020-0084     1\n",
      "36                                         10.1055/a-1301-8852     0\n",
      "37                            10.1109/icassp40776.2020.9054411     0\n",
      "38                                     10.1145/3434770.3459736     0\n",
      "39                                     10.1093/ndt/gfab128.003     0\n",
      "40                                        10.1128/jvi.00351-16    15\n",
      "41                                10.1302/0301-620x.98b1.36347    26\n",
      "42                                       10.1093/icvts/ivaa235     0\n",
      "43                                    10.1177/1747021818769259     3\n",
      "44                                  10.21203/rs.3.rs-122548/v1     1\n",
      "45                                          10.1039/c5cc01488c    22\n",
      "46                                      10.1002/pssa.201532819     2\n",
      "47                                      10.1093/cvr/cvy060.413     0\n",
      "48                                           10.1116/1.4965883    14\n",
      "49                                           10.1111/aor.12725     9\n",
      "50                                             10.1002/cpcy.20     3\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. \n",
       "   0.00    0.00    1.00    5.84    6.50   73.00 "
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "# retrieve citation information for the sample DOIs\n",
    "DF_citations <- cr_citation_count(doi = DOI_sample$x)\n",
    "                           \n",
    "print(DF_citations)\n",
    "summary(DF_citations$count)"
   ]
  }
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