function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Li, FENGYUAN & LI, SHUQIANG & Jäger, Peter', 6],
    ['Li, Fengyuan & Liu, Chang & Li, Shuqiang', 11],
    ['Li, Fengyuan & Liu, Chang & Wongprom, Prasit & Li, Shuqiang', 1],
    ['Lin, Yejie & Tavano, Maria L. & Li, Shuqiang & Chen, Haifeng', 1],
    ['Liu, Chang & Li, Fengyuan & Wongprom, Prasit & Zheng, Guo', 12],
    ['Wang, Chunxia & Li, Shuqiang', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);