function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Parasitologica', 1],
    ['Acta Zoologica Sinica', 1],
    ['Acta Zootaxonomica Sinica', 1],
    ['Annales de Parasitologie Humaine et Comparée', 2],
    ['Annals of Tropical Medicine and Parasitology', 1],
    ['Arch. Escola Super. Agrie, e Med. Vet., Rio de Janeiro', 4],
    ['Biodiversity Data Journal', 1],
    ['Brazil-Med', 1],
    ['Bulletin de la Société Zoologique de France', 1],
    ['Bulletin de la Société de Pathologie Exotique', 1],
    ['Dobutsugaku Zasshi', 2],
    ['Journal of Parasitology', 3],
    ['Journal of helminthology', 3],
    ['Proceedings of the Helminthological Society of Washington', 2],
    ['Revista Brasileira de Biologia', 2],
    ['Other (24)', 24]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=50)',
    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);