function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cai, Lei & Liu, Fang-Pu & Yi, Xiang-Bo & Dao, Zhi-Ling', 1],
    ['Chen, Wen Hong & Nguyen, Quang Hieu & Chen, Run Zheng', 2],
    ['Fu, Qiong & Xia, Ying & Guo, Ying & Huang, Rong', 1],
    ['Le, Khuong Duy & Nguyen, Thanh Trung & Nguyen, Phuong Thanh', 1],
    ['Li, Zheng-Long & Ma, Hai-Jun & Ye, Zheng-Rong & Meng, De-Chang', 1],
    ['Pachycephalidae & Aegithalidae & Remizidae & Paridae & Sittidae', 2],
    ['Pan, Bo & Tang, Guang-Da & Do, Truong Van & Maciejewski, Stephen', 1],
    ['Yang, Jia-Wen & Qin, Xin-Mei & Xu, Jian & Li, Cong-Rui', 1],
    ['Yang, Li-Hua & Wen, Fang & Kong, Hang-Hui & Sun, Zhi-Xia', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);