function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hu, Ya-Hui & Jiang, Cheng & Jiang, Ji-Gang', 2],
    ['Jiang, Ji-Gang & Huang, Cheng-Wang & Luan, Yun-Xia', 1],
    ['Jiang, Ji-Gang & Wang, Wen-Bin & Xia, Hu', 1],
    ['Ma, Zhi-Chun & Chen, Jian-Xiu', 1],
    ['Nguyen, Anh T. T. & Thuy, Kim N. & Arbea, Javier I.', 3],
    ['Smolis, Adrian', 2],
    ['Wan, Ya-Ru & Wang, Wen-Bin & Jiang, Jigang', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);