function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of the National Science Museum, Series A, Zoology', 4],
    ['Japanese Journal of Zoology', 1],
    ['Journal of Parasitology', 2],
    ['Journal of Xiamen University (Natural Science)', 1],
    ['Journal of helminthology', 1],
    ['Keigaku Publishing Company', 1],
    ['Oceanologia et Limnologia Sinica', 3],
    ['Papers and proceedings of the Royal Society of Tasmania', 1],
    ['Proceedings of the Helminthological Society of Washington', 2],
    ['Satyû Yamaguti', 3],
    ['Studia Marina Sinica', 4],
    ['Systematic Parasitology', 2],
    ['The American Midland Naturalist', 1],
    ['Transactions of the American Microscopical Society', 2],
    ['Transactions of the Royal Society of New Zealand', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=29)',
    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);