function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Bin & Liu, Ying & Luo, Jian-Xun & Wang, Qi & Yang, Qin-Er', 2],
    ['Fei, Wen-Qun & Zeng, You-Pai & Yang, Qin-Er', 1],
    ['Peng, Jing-Yi & Zhang, Dai-Gui & Deng, Tao & Huang, Xian-Han', 1],
    ['Su, Xiu-Jiang & Fei, Wen-Qun & Zhao, Ding & Liu, Ying', 2]
  ]);
  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);