function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Denk, Thomas & Sami, Marco & Teodoridis, Vasilis', 1],
    ['Holttum, Richard Erick', 5],
    ['Info Flora', 1],
    ['Jarvis, Charlie', 1],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 2],
    ['Qin, Qiao-Mei & Cai, Zhuo-Yu & Ni, Jing-Bo & Tong, Yi-Hua', 4],
    ['Tran, Van Tien', 1],
    ['Wong, Khoon Meng & Diep, My Hanh', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);