function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anales del Instituto de Biologia Universidad de Mexico', 1],
    ['Atti della Società Ligustica di Scienze Naturali e Geografiche', 1],
    ['Indian Journal of Helminthology', 2],
    ['Izvestiya Tikhookeanskogo Nauchno-Issledovatel\'skogo Instituta Rybnogo Khozyaistva i Okeanografii (TINRO)', 1],
    ['Keigaku Publishing Company', 1],
    ['Kuwait Bulletin of Marine Science', 1],
    ['Oceanologia et Limnologia Sinica', 2],
    ['Pakistan Journal of Zoology', 3],
    ['Proceedings of the Helminthological Society of Washington', 1],
    ['Proceedings of the United States National Museum, 3', 1],
    ['Quarterly journal of microscopical science, n. s.', 1],
    ['Rivista di Parassitologia', 1],
    ['Satyû Yamaguti', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);