function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Societe Entomologique de Belgique', 8],
    ['British Museum', 16],
    ['Bulletin de la Societe Vaudoise des Sciences Naturelles', 7],
    ['Bulletin of the American Museum of Natural History', 6],
    ['Bulletin of the Museum of Comparative Zoology', 21],
    ['Histoire Physique, Naturelle et Politique de Madagascar.', 3],
    ['Journal of the Proceedings of the Linnean Society of London, Zoology', 9],
    ['Linzer biologische Beiträge', 2],
    ['Madras Journal of Literature and Science', 2],
    ['Memoires de l\'Institut Francais d\'Afrique Noire', 3],
    ['Myrmecological News', 16],
    ['PLoS ONE', 4],
    ['Verhandlungen der Zoologisch-Botanischen Gesellschaft in Wien', 7],
    ['Voyage de Ch. Alluaud et R. Jeannel en Afrique Orientale (1911 - 1912). Résultats scientifiques. Hyménoptères', 3],
    ['Zootaxa', 32],
    ['Other (18)', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=158)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);