function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, W.', 8],
    ['Bai, Yue & Chen, Bin & Li, Ting-Jing', 2],
    ['Dvořák, Libor & Castro, Leopoldo', 1],
    ['Ebrahimi, Ebrahim & Carpenter, James M.', 1],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 2],
    ['Fateryga, A. V. & Proshchalykin, M. Yu. & Aliyev, Kh. A.', 1],
    ['Fateryga, Alexander V. & Proshchalykin, Maxim Yu.', 1],
    ['Gusenleitner, J.', 35],
    ['Selis, Marco', 1],
    ['Yildirim, E. & Gusenleitner, J.', 1],
    ['Yildirim, Erol & Gusenleitner, Josef', 2],
    ['Yildirim, Erol & Tezcan, Serdar', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=57)',
    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);