function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Guan, Qian-Xin & Huang, Jing & Huang, Jian & Zhao, Chang-Lin', 3],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1],
    ['Ma, Xiang & Zhao, Chang-Lin', 2],
    ['Riebesehl, Janett & Yurchenko, Eugene & Nakasone, Karen K.', 14],
    ['Viner, Ilya & Spirin, Viacheslav & Zibarova, Lucie', 9],
    ['Zhang, Xiaojie & Yuan, Qi & Su, Jiangqing & Zhao, Changlin', 1],
    ['Zhang, Xunchi & Li, Yunchao & Wang, Yuyun & Xu, Zhan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);