function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annals of the Carnegie Museum', 1],
    ['Bulletin de la Société Zoologique de France', 1],
    ['Bulletin of the American Museum of Natural History', 1],
    ['Bulletin of the Fan Memorial Institute of Biology', 1],
    ['Journal Hydrobiol.', 1],
    ['Nouveaux Mémoires de la Société Impériale des Naturalistes de Moscou', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the United States National Museum, 3', 1],
    ['Raffles Bulletin of Zoology', 1],
    ['Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin', 1],
    ['The Journal of the Natural History Society of Siam', 1],
    ['Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien', 4],
    ['Verslagen en Mededeelingen der Koninklijke Akademie van Wetenschappen. Afdeeling Natuurkunde', 5],
    ['Zootaxa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);