function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gu, Mo & Hu, Dong-Wei & Han, Bing & Jiang, Ning', 1],
    ['Huanaluek, Naruemon & Jayawardena, Ruvishika S.', 4],
    ['Li, Hua & Manawasinghe, Ishara S. & Zhang, Yunxia', 2],
    ['Tian, Shangqing & Xu, Rong & Bhunjun, Chitrabhanu S.', 1],
    ['Wang, Yifeng & Tsui, Kin-Ming & Chen, Shimei & You, Chongjuan', 3],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 3],
    ['Yang, Qi & He, Yu-Ke & Yuan, Jun & Wang, Yong', 2],
    ['Yang, Qi & Zeng, Xiang-Yu & Yuan, Jun & Zhang, Qian & He, Yu-Ke', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);