function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bian, Xun & Liu, Jing & Yang, Zizhong', 1],
    ['Bian, Xun & Lu, Xiangyi & Chen, Jiali', 1],
    ['Ingrisch, Sigfrid', 2],
    ['Lu, Xiangyi & Zhang, Qianwen & Bian, Xun', 20],
    ['Pang, Siyu & Zhang, Qianwen & Bian, Xun', 2],
    ['Xun, Bian & Rong-Sheng, Lu & Fuming, Shi', 7],
    ['Zhang, Qianwen & Lu, Xiangyi & Bian, Xun', 2],
    ['Zhang, Qianwen & Luo, Yehong & Bian, Xun', 11],
    ['Zhang, Qianwen & Pang, Siyu & Bian, Xun', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    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);