function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alcock, Alfred William', 1],
    ['Amaoka, Kunio', 1],
    ['Amaoka, Kunio & Arai, M. & Gomon, Martin F.', 1],
    ['Amaoka, Kunio & Ho, Hsuan-Ching', 8],
    ['Amaoka, Kunio & Imamura, Hisashi', 1],
    ['Artüz, M. Levent & Fricke, Ronald', 1],
    ['Bariche, Michel & Fricke, Ronald', 5],
    ['Bogorodsky, Sergey V. & Alpermann, Tilman J. & Mal, Ahmad O.', 1],
    ['Boulenger, George Albert', 1],
    ['Carneiro, Miguel & Martins, Rogélia & Landi, Monica', 4],
    ['Fricke, Ronald & Golani, Daniel & Appelbaum-Golani, Brenda', 1],
    ['Klausewitz, Wolfgang & Schneider, M.', 2],
    ['Norman, J. R.', 3],
    ['Nurettin Meriç & Lütfiye Eryilmaz & Müfit Özulug', 3],
    ['Voronina, Elena P. & Volkova, Galina A.', 3],
    ['Other (9)', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);