function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen der Böhmischen. Gesellschaft der Wissenschaften', 3],
    ['Annales de la Société Impériale d\'Agriculture, Histoire Naturelle de Lyon', 1],
    ['Bulletin of the American Museum of Natural History', 2],
    ['Bulletin of the Bernice Pauahi Bishop Museum', 1],
    ['Bulletin of the United States Bureau of Fisheries', 3],
    ['Ichthyological Bulletin of the J. L. B. Smith Institute of Ichthyology', 2],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 1],
    ['Occasional Papers of the Bernice P. Bishop Museum', 2],
    ['Philippine Journal of Science, Section D', 1],
    ['Proceedings of the United States National Museum, 3', 4],
    ['Records of the Australian Museum', 1],
    ['Verslagen en Mededeelingen der Koninklijke Akademie van Wetenschappen. Afdeeling Natuurkunde', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);