function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Protozoologica', 8],
    ['Havniae & Lipsiae', 14],
    ['Japanese Journal of Zoology', 1],
    ['Journal of Eukaryotic Microbiology', 13],
    ['Journal of Natural History', 6],
    ['Journal of Parasitology', 1],
    ['Linzer biologische Beiträge', 1],
    ['Phytotaxa', 1],
    ['Public Library of Science, ONE', 3],
    ['Reise der österreichischen Fregatte Novara um die Erde ..', 1],
    ['Stapfia', 2],
    ['The Journal of Eukaryotic Microbiology', 2],
    ['Zoologica scripta', 2],
    ['Zoological Journal of the Linnean Society', 4],
    ['Zootaxa', 64]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=123)',
    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);