function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 5],
    ['Amphibian & Reptile Conservation', 1],
    ['Bulletin of the American Museum of Natural History', 2],
    ['Check List', 27],
    ['European Journal of Taxonomy', 2],
    ['Geodiversitas', 1],
    ['Herpetologica', 2],
    ['Herpetological Monographs', 13],
    ['Papéis Avulsos de Zoologia', 3],
    ['Phyllomedusa', 1],
    ['ZooKeys', 19],
    ['Zoological Journal of the Linnean Society', 20],
    ['Zoosystematics and Evolution', 1],
    ['Zootaxa', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=112)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);