function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Crespo, Luis C & Domenech, Marc & Enguidanos, Alba', 1],
    ['Hormiga, Gustavo', 1],
    ['Hormiga, Gustavo & Lew, Stephen', 2],
    ['Irfan, Muhammad & Wang, Lu-Yu & Zhao, Jingxia & Zhang, Zhi-Sheng', 3],
    ['Isaia, Marco & Paschetta, Mauro & Chiarle, Alberto', 1],
    ['Lin, Yejie & Li, Shuqiang & Pham, Dinh-Sac', 2],
    ['Lin, Yejie & Marusik, Yuri M. & Gao, Caixia & Xu, Hao', 4],
    ['Michalik, Peter & Hormiga, Gustavo', 1],
    ['Xu, Hao & Zhang, Xiaoqing & Yao, Zhiyuan & Ali, Abid', 36],
    ['Xu, Xiang & Li, Shuqiang', 1],
    ['Zhang, Xiaoqing & Lan, Tianqi & Nie, Lei & Li, Shuqiang', 9],
    ['Zhang, Xiaoqing & Li, Shuqiang', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=65)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);