function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chun-Sheng, Long & You-Peng, Wu & Xu, Zhang & Yan, Lin', 1],
    ['Fu, Xi & Bao, Dan-Feng & Luo, Zong-Long & He, Xiu & Su, Hong-Yan', 1],
    ['Liu, Ling-Ling & Song, Lian-Chai & Gu, Xiao-Feng', 1],
    ['Yang, Jing & Liu, Jian-Kui & Hyde, Kevin D.', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    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);