function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft', 1],
    ['Acarologia', 87],
    ['Acarological Studies', 9],
    ['Beiträge zur Neotropischen Fauna', 1],
    ['Ecologica Montenegrina', 12],
    ['Entomologisk Tidskrift', 1],
    ['Memoirs of the Museum of Victoria', 7],
    ['Persian Journal of Acarology', 2],
    ['Sitzungsberichte der Naturforschenden Gesellschaft zu Leipzig', 1],
    ['The Beagle. Records of the Museums and Art Galleries of the Northern Territory', 4],
    ['ZooKeys', 2],
    ['Zoological Systematics', 2],
    ['Zoologischer Anzeiger', 1],
    ['Zoosystema', 3],
    ['Zootaxa', 123]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=256)',
    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);