function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 1],
    ['Belgian Journal of Entomology', 1],
    ['Biodiversity Data Journal', 119],
    ['Bulletin Inst R Sci Nat Belg Ent', 1],
    ['Bulletin de l\'Institut Royal des Sciences Naturelles de Belgique, Entomologie', 7],
    ['Bulletin et Annales de la Société Royale Belge d\'Entomologie', 2],
    ['European Journal of Taxonomy', 16],
    ['Insect Systematics and Diversity', 6],
    ['Journal of Hymenoptera Research', 6],
    ['Journal of Threatened Taxa', 1],
    ['Kontyu', 1],
    ['Linzer biologische Beiträge', 5],
    ['PeerJ', 1],
    ['ZooKeys', 2],
    ['Zootaxa', 54]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=223)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);