function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jiang, Ri-Xin & Bai, Xing-Long & Ren, Guo-Dong & Yang, Hui-Yu', 13],
    ['Jiang, Ri-Xin & Chen, Xiang-Sheng', 1],
    ['Jiang, Ri-Xin & Li, Ze-Chuan & Ji, Quan-Yu & Engel, Michael S.', 3],
    ['Jiang, Ri-Xin & Zhou, Qing-Hua & Liu, Yi-Feng & Huang, Yu-Zhou', 3],
    ['Purchart, Luboš', 7],
    ['Ren, G. & Xu, J.', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);