function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Atas da Sociedade de biologia do Rio de Janeiro', 1],
    ['Bulletin de l\'Institut Fondamental d\'Afrique Noire', 1],
    ['Comparative Parasitology', 1],
    ['Journal of Parasitology', 1],
    ['Journal of the Helminthological Society of Washington', 1],
    ['Neotropica, La Plata', 1],
    ['Revista Brasileira de Biologia', 1],
    ['Revista Ibérica de Parasitología', 1],
    ['Revue suisse de Zoologie', 2],
    ['Scientific Survey of Porto Rico and the Virgin Islands', 1],
    ['Systematic Parasitology', 2],
    ['The American Midland Naturalist', 1],
    ['ZooKeys', 1],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=20)',
    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);