function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Medica Okayama', 1],
    ['Indian Journal of Helminthology', 3],
    ['Japanese Journal of Zoology', 3],
    ['Journal of Fujian Teachers University (Natural Science)', 2],
    ['Keizyo Journal of Medicine', 1],
    ['Marathwada University Journal of Science (Biol Sci)', 2],
    ['Pakistan Journal of Zoology', 1],
    ['Parazitologiya', 1],
    ['Proceedings of Parasitology', 1],
    ['Proceedings of the National Academy of Sciences, India, Section B, Biological Sciences', 3],
    ['Publications of the Seto Marine Biological Laboratory', 1],
    ['Rivista di Parassitologia', 3],
    ['Satyû Yamaguti', 6],
    ['Transactions of the Royal Society of New Zealand', 1],
    ['Wuyi Science Journal', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=30)',
    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);