function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anzeiger', 3],
    ['Bonner zoologische Beiträge', 1],
    ['Breviora', 1],
    ['Bulletin of the Museum of Comparative Zoology at Harvard College, 3', 1],
    ['F. S. Hübschmann, Monachii [= Munich] & Fleischer, Lipsiae [= Leipzig]', 1],
    ['Neotropical Ichthyology', 2],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 3],
    ['Proceedings of the American Philosophical Society', 2],
    ['Proceedings of the Biological Society of Washington', 3],
    ['Proceedings of the National Academy of Sciences of the United States of America', 2],
    ['Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaften Classe', 4],
    ['Tropical Fish Hobbyist', 3],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zootaxa', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=36)',
    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);