function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amphibian & Reptile Conservation', 2],
    ['Australasian Journal of Herpetology', 4],
    ['Biodiversity Data Journal', 4],
    ['Bulletin of the American Museum of Natural History', 3],
    ['Check List', 5],
    ['Diversity', 2],
    ['Geodiversitas', 13],
    ['Laurentius Salvius', 10],
    ['Magasin Encyclopédique, ou Journal des Sciences, des Lettres et des Arts', 2],
    ['Palaeontologia Electronica', 2],
    ['South American Journal of Herpetology', 12],
    ['Vertebrate Zoology', 9],
    ['ZooKeys', 12],
    ['Zoological Journal of the Linnean Society', 7],
    ['Zootaxa', 17],
    ['Other (6)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=111)',
    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);