function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bilanski, Piotr & Jankowiak, Robert & Solheim, Halvor', 3],
    ['Chang, Runlei & Zhang, Xiuyu & Si, Hongli & Zhao, Guoyan', 1],
    ['Min Wang, Hui & Wang, Zheng & Liu, Fu & Xu Wu, Cheng', 2],
    ['Ostafinska, Agnieszka & Jankowiak, Robert & Bilanski, Piotr', 6],
    ['Wang, HuiMin & Lun, YingYing & Lu, Quan & Liu, HuiXiang', 1],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);