function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kang, Zehui & Zhang, Xiao', 2],
    ['Kolcsar, Levente-Peter & Oosterbroek, Pjotr', 1],
    ['Men, Qiu-Lei', 3],
    ['Men, Qiulei & Lu, Zhiyong & Sheng, Pingping & Gui, Xiang', 2],
    ['Men, Qiulei & Sun, Mengwei & Starkevich, Pavel', 1],
    ['Podenas, Sigitas', 5],
    ['Podenas, Sigitas & Byun, Hye-Woo', 7],
    ['Xu, Yuanyuan & Yao, Yilin & Zhang, Peifu & Zheng, Runze', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);