function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 1],
    ['Huang, Shih-Pin & Zhao, Yahui & Chen, I-Shiung', 1],
    ['Jiang, Zhong-Guan & Gao, Er-Hu', 1],
    ['Kim, I. - S. & Yang, H.', 1],
    ['Mai, D. Y.', 2],
    ['Mori, T.', 2],
    ['Sun, Zhixian & Zhao, Yahui', 2],
    ['Xing, Ying-Chun & Zhao, Ya-Hui & Tang, Wen-Qiao', 1],
    ['Ye, Enqi & Xing, Yingchun & Zhang, Chunguang & Zhao, Yahui', 2],
    ['Yue, P. - Q.', 1],
    ['Zhao, Y. - H. & Zhang, C. - G.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);