function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Venezuelica', 1],
    ['Acta Parasitologica', 2],
    ['American Museum Novitates', 1],
    ['Ann. Fac. Med. S. Paulo', 1],
    ['Annals of Tropical Medicine and Parasitology', 1],
    ['Archives Roumaines de Pathologie Experimentales et de Microbiologie', 1],
    ['Biodiversity Data Journal', 2],
    ['Bollettino della Società Zoologica Italiana, Series 2', 1],
    ['Brazil Medico', 1],
    ['Compte Rendu de la Societe de Biologie Paris', 2],
    ['Journal of Natural History', 13],
    ['Journal of Parasitology', 7],
    ['Proceedings of the Helminthological Society of Washington', 4],
    ['Proceedings of the United States National Museum', 2],
    ['Transactions of the American Microscopical Society', 2],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=48)',
    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);