function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hu, Bingbing & Wang, Shuxia & Zhang, Jing & Li, Houhun', 1],
    ['Jiang, Yurong & Zhao, Yang & Wang, Encui & Zhang, Tongyou', 2],
    ['Kawakita, Atsushi & Kato, Makoto', 9],
    ['Li, Houhun & Wang, Zhibo & Hu, Bingbing', 4],
    ['Li, Houhun & Yang, Xiaofei', 3],
    ['Li, Houhun & Zhang, Zhenguo', 5],
    ['Zhang, Jing & Hu, Bingbing & Wang, Shuxia & Li, Houhun', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);