function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alderwerelt van Rosenburgh, Capt. C. R. W. K.', 1],
    ['Fang, Ke-Yi & Tong, Yi-Hua & Vu, Tien-Chin & Nguyen, Khang-Sinh', 1],
    ['Liu, Zhong-Chong & Liu, Jia & Zhao, Wan-Yi & Fan, Qiang', 1],
    ['Merrill, Elmer Drew & Perry, Lily May', 1],
    ['Ordas, Jorge Anton D. & Pinarok, Neil Alejandro A.', 1],
    ['Ridley, Henry Nicholas', 5],
    ['Valeton, Theodoric', 6],
    ['Wijnands, Dirk Onno & Heniger, Johannes & Veldkamp, Jan Frederik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);