function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abotsi, Komla Elikplim & Kokou, Kouami & Dubuisson, Jean-Yves', 2],
    ['Blume, Carl Ludwig von', 5],
    ['Brause, Guido Georg Wilhelm', 6],
    ['Christenhusz, Maarten J. M. & Zhang, Xian-Chun', 7],
    ['Copeland, Edwin Bingham', 2],
    ['Fischer, Eberhard & Lobin, Wolfram', 4],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 3],
    ['Hori, Kiyotaka', 2],
    ['Hori, Kiyotaka & Kanemitsu, Hironobu', 2],
    ['Info Flora', 2],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 10],
    ['Pongkai, Puttamon & Zhang, Li-Bing & Boonkerd, Thaweesakdi', 32],
    ['Rakotondrainibe, France & Jouy, Alain', 10],
    ['Rosenstock, Eduard', 4],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 5],
    ['Other (16)', 20]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=116)',
    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);