function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Libin, Ma & Yalin, Zhang', 7],
    ['Ma, Libin & Zhang, Ya-Lin', 3],
    ['Mal, Jhabar & Nagar, Rajendra & Swaminathan, R.', 2],
    ['Yuan, Li-Lan & Xu, Fei & Wang, Xiao-Xiao & Zhang, Dong-Xiao', 2],
    ['Zheng, Yanna & Xin, Zhixia & Xie, Lingde & Ma, Libin', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);