function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des K. K. Naturhistorischen Hofmuseums in Wien', 3],
    ['Annals of the Carnegie Museum', 2],
    ['Biodiversity Data Journal', 2],
    ['Blätter für Aquarien- und Terrarien-Kunde', 1],
    ['Bol. Biol. Sao Paulo', 2],
    ['Check List', 1],
    ['Ichthyological exploration of freshwaters', 1],
    ['Memoires de la Sociedad de Ciencias Naturales La Salle', 1],
    ['Neotropical Ichthyology', 4],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Proceedings of the California Academy of Sciences, Series 2', 1],
    ['Stanford Ichthyological Bulletin', 1],
    ['Transactions of the Zoological Society of London', 1],
    ['Zoologische Verhandelingen, Leiden', 1],
    ['Zootaxa', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=33)',
    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);