function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 13],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 2],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 2],
    ['Essl, F. & Stöhr, O.', 1],
    ['Funez, Luís A. & Hassemer, Gustavo', 2],
    ['Ito, Yu & Barfod, Anders S.', 2],
    ['Jarvis, Charlie', 10],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 10],
    ['Li, Bo & Fan, Dengmei & Lei, Shuqing & Zhang, Zhiyong', 4],
    ['Monteiro, Francisca & Costa, Esperança Da & Kissanga, Raquel', 3],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 2],
    ['Prota, N. & Mumm, R. & Bouwmeester, H. J. & Jongsma, M. A.', 2],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 2],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Wittmann, H. & Hohla, M.', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 6],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=66)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);