function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zootaxonomica Sinica', 3],
    ['Biodiversity Data Journal', 1],
    ['Bulletin of the National Science Museum, Series A, Zoology', 1],
    ['Bulletin of the hygienic Laboratory, Washington', 3],
    ['Indian Journal of Helminthology', 1],
    ['Journal of Ecobiology', 1],
    ['Journal of Parasitology', 6],
    ['PKV Research Journal', 1],
    ['Parasitology', 1],
    ['Philippine Journal of Science, Section D', 1],
    ['Rivista di Parassitologia', 1],
    ['The Ohio Journal of Science', 1],
    ['Zoologische Jahrbucher, Abteilung für Systematik', 2],
    ['Zoologischer Anzeiger', 2],
    ['Zootaxa', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);