function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zoologica Sinica', 1],
    ['Acta Zootaxonomica Sinica', 1],
    ['Annales de Parasitologie Humaine et Comparée', 1],
    ['Bangladesh Journal of Zoology', 1],
    ['Bioinfolet', 1],
    ['Indian Journal of Helminthology', 5],
    ['Japanese Journal of Zoology', 2],
    ['National Museum of Nature and Science Monographs', 1],
    ['Pakistan Journal of Zoology', 3],
    ['Peking Natural History Bulletin', 1],
    ['Proceedings of the Japanese Society of Systematic Zoology', 1],
    ['Rivista di Parassitologia', 4],
    ['Satyû Yamaguti', 1],
    ['Science Press', 1],
    ['Transactions of the American Microscopical Society', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    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);