function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 1],
    ['Dreyer, Léanne L. & Roets, Francois & Oberlander, Kenneth C.', 2],
    ['F. Muñoz Garmendia & C. Navarro & A. Quintanar & A. Buira', 12],
    ['Haran, Julien M. & Marvaldi, Adriana E. & Benoit, Laure', 2],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 5],
    ['Info Flora', 5],
    ['Jarvis, Charlie', 18],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 5],
    ['Kuetegue, Felix & Sonke, Bonaventure & Ameka, Gabriel K.', 2],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 4],
    ['Linnaeus, Carolus', 16],
    ['Nuernberg-Silva, Anelise & Fiaschi, Pedro', 13],
    ['Suda, Jan & Krejčíková, Jana & Sudová, Radka', 3],
    ['Wijnands, Dirk Onno & Heniger, Johannes & Veldkamp, Jan Frederik', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2],
    ['Other (20)', 20]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=112)',
    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);