function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bennett, Daniel J. & Engel, Michael S.', 1],
    ['Gadallah, Neveen S.', 4],
    ['Gadallah, Neveen S. & Abu El-Ghiet, Usama M.', 2],
    ['H, Phong & G, P. & N, Yuriy', 1],
    ['Jacobs, Hans-Joachim & Liebig, Wolf-Harald', 1],
    ['Jahantigh, Fatemeh & Rakhshani, Ehsan & Mokhtari, Azizollah', 2],
    ['Li, Tingjing & Li, Qiang', 3],
    ['Madl, M.', 9],
    ['Shuckard, W. E.', 2],
    ['Smith, Frederick', 3],
    ['Swezey, O. H.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);