function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araújo, Diogo & Alves, Marccus', 2],
    ['Bankov, Nikola & Todorov, Milcho & Ganeva, Anna', 26],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 2],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 2],
    ['Do, Truong Van & Hoang, Thao Thi & Wen, Fang & Wanke, Stefan', 2],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 6],
    ['Info Flora', 5],
    ['Jang, Hyun-Do & Nam, Gi-Heum & Oh, Hyun-Kyung & Leem, Hyosun', 2],
    ['Jarvis, Charlie', 23],
    ['Jiménez, José Esteban & Fernández, Reinaldo Aguilar', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 3],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 8],
    ['Linnaeus, Carolus', 4],
    ['Parsons, Michael J.', 9],
    ['Schmidt, Otto Christian', 4],
    ['Other (34)', 38]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=138)',
    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);