function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Invertebrate Biology', 2],
    ['Invertebrate Systematics', 3],
    ['Papers and proceedings of the Royal Society of Tasmania', 2],
    ['Proceedings of the Linnean Society of New South Wales, 2', 1],
    ['Proceedings of the Royal Society of Victoria (n. s.)', 1],
    ['Public Library of Science, ONE', 3],
    ['Quarterly Journal of Microscopical Science, n. s.', 1],
    ['Records of the Western Australian Museum', 3],
    ['The Journal of the Linnean Society of London, Zoology', 2],
    ['The Zoological Journal', 1],
    ['Zoologia', 5],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 10]
  ]);
  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);