function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft', 1],
    ['American Museum Novitates', 1],
    ['Annual Report of the Peabody Academy of Science', 1],
    ['Biodiversity Data Journal', 5],
    ['European Journal of Taxonomy', 5],
    ['Linzer biologische Beiträge', 3],
    ['Proceedings of the California Academy of Sciences, Series 1', 1],
    ['Proceedings of the California Academy of Sciences, Series 4', 1],
    ['Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin', 1],
    ['Subterranean Biology', 3],
    ['ZooKeys', 22],
    ['Zoosystema', 22],
    ['Zootaxa', 135]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=201)',
    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);