function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ding, Hong-Bo & Yang, Bin & Maw, Mya Bhone & Win, Pyae Pyae', 4],
    ['Ding, Min & Wu, Sheng-Li & Hu, Jing & He, Xiao-Feng', 1],
    ['Fu, Lin & Huang, Jian-Ping & Wu, Xing & Du, Zhi-Jian & Lin, Ling', 1],
    ['Karunarathne, Piyal & Yakandawala, Deepthi', 1],
    ['Lin, Yun & Bi, Hai-Yan & Sun, Jun & Sun, Qian', 2],
    ['Linnaeus, Carolus', 4],
    ['Ridley, Henry Nicholas', 2],
    ['Schumann, Karl Moritz', 1],
    ['Smith, Rosemary Margaret', 1],
    ['Thomas, V. P. & Nissar, Muhammed & Gupta, U.', 1],
    ['Thomas, V. P. & Sabu, M. & Kumar, K. M. Prabhu', 1],
    ['Ye, Xing-Er & Leong-Škorničková, Jana & Bai, Lin & Xia, Nian-He', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);