function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, W.', 1],
    ['Ebrahimi, Ebrahim & Carpenter, James M.', 1],
    ['Fateryga, A. V. & Proshchalykin, M. Yu. & Aliyev, Kh. A.', 1],
    ['Gusenleitner, J.', 10],
    ['Li, Ting-Jing & Bai, Yue & Chen, Bin', 7],
    ['Rafi, Muhammad Ather & Carpenter Muhammad Qasim, James M.', 1],
    ['Schmid, Christian', 4],
    ['Yildirim, E. & Gusenleitner, J.', 2],
    ['Yildirim, Erol & Gusenleitner, Josef', 1],
    ['Yildirim, Erol & Tezcan, Serdar', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);