function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des Naturhistorischen Museums in Wien', 1],
    ['Anzeiger', 1],
    ['Bulletin de l\'Akadémie Impériale des Sciences de St. Pétersbourg, 5', 1],
    ['Bulletin de la Société Philomathique de Paris, Série 7', 1],
    ['Copeia', 2],
    ['Cybium', 17],
    ['Eawag: Swiss Federal Institute of Aquatic Science and Technology', 5],
    ['European Journal of Taxonomy', 7],
    ['Isis von Oken', 1],
    ['Izv. Kavk. Otd. Russ. Geogr. Obsc. Tiflis', 1],
    ['The American Naturalist', 1],
    ['Trudy Inst. Zool. Paras. Kyrgyzstan', 1],
    ['Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien', 1],
    ['Zoosystematics and Evolution', 2],
    ['Zootaxa', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=43)',
    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);