function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 3],
    ['Centralblatt für Bakteriologie, Parasitenkunde und Infektionskrankheiten', 1],
    ['Centralblatt für Bakteriologie, Parasitenkunde und Infektionskrankheiten, Abteilung 1, Originale', 1],
    ['Exploration du Parc national Congo Belge Miss Baer & Gerber', 1],
    ['Fujian Shida Xuebao', 1],
    ['Japanese Journal of Zoology', 1],
    ['Monatsbericht der Deutschen Akademie der Wissenschaften Berlin', 1],
    ['Proceedings of the Helminthological Society of Washington', 1],
    ['Proceedings of the National Academy of Sciences, India, Section B, Biological Sciences', 2],
    ['Revue suisse de zoologie', 1],
    ['Vestnik Zoologii', 2],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);