function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bian, Xun', 1],
    ['Bian, Xun & Guo, Li-Ying & Shi, Fu-Ming', 2],
    ['Bian, Xun & Liu, Jing & Yang, Zizhong', 1],
    ['Du, Baojie & Bian, Xun & Shi, Fuming', 3],
    ['Hollier, John & Maehr, Michael, D.', 1],
    ['Ingrisch, Sigfrid', 9],
    ['Li, Miaomiao & Liu, Xianwei & Li, Kai', 3],
    ['Pang, Siyu & Zhang, Qianwen & Bian, Xun', 2],
    ['Shen, Si-Zhong & Yin, Zi-Xu', 3],
    ['Tan, Ming Kai & Kamaruddin, Khairul Nizam', 1],
    ['Yin, Zi-Xu & Meng, Ling-Xin', 2],
    ['Yin, Zi-Xu & Shen, Si-Zhong', 1],
    ['Zhang, Qianwen & Zhang, Bin & Bian, Xun', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);