function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['He, Yu-Ke & Yang, Qi & Sun, Ya-Ru & Zeng, Xiang-Yu', 3],
    ['Hsu, Sheng-Yu & Xu, Yuan-Cheng & Lin, Yu-Chen & Chuang, Wei-Yu', 3],
    ['Huanaluek, Naruemon & Jayawardena, Ruvishika S.', 2],
    ['Wang, Yifeng & Tsui, Kin-Ming & Chen, Shimei & You, Chongjuan', 2],
    ['Yang, Qi & Zeng, Xiang-Yu & Yuan, Jun & Zhang, Qian & He, Yu-Ke', 3],
    ['Zhang, Zhaoxue & Liu, Rongyu & Liu, Shubin & Mu, Taichang', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);