function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chun-Sheng, Long & You-Peng, Wu & Xu, Zhang & Yan, Lin', 2],
    ['Liu, Yu & Xu, Gui-Ping & Yan, Xin-Yi & Chen, Min-Hui & Gao, Yang', 1],
    ['Shi, Lin & Yang, Hao & Hyde, Kevin D. & Wijayawardene, Nalin N.', 2],
    ['Yang, Jun-Xian & Zhang, Huang & Wang, Lin & Zhu, Rong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=6)',
    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);