function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ai, Hong-Mu & Lin, Jun-Hong & Wang, Pei & Zhou, Wei-Chuan', 3],
    ['Ding, Hong-Li & Wang, Pei & Qian, Zhou-Xing & Lin, Jun-Hong', 6],
    ['Inkhavilay, Khamla & Sutcharit, Chirasak & Bantaowong, Ueangfa', 7],
    ['Sutcharit, Chirasak & Panha, Somsak', 2],
    ['Wang, Pei & Hu, Mei-Ling & Lin, Jun-Hong & Yang, Hai-Fang', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);