function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['He, Jia-Jun & Jin, Du-Ting & Wang, Yi-Shu & Che, Yan-Li', 7],
    ['Li, Qian-Qian & Yao, Wen-Wen & Zhang, Ke & Wang, Zong-Qing', 7],
    ['Wang, Jinjin & Li, Xinran & Wang, Zongqing & Che, Yanli', 8],
    ['Wang, Zong-Qing & Che, Yan-Li & Wang, Jin-Jun', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);