function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amphibian & Reptile Conservation', 2],
    ['Bulletin of the American Museum of Natural History', 1],
    ['Check List', 4],
    ['Geodiversitas', 1],
    ['Herpetozoa', 1],
    ['Journal of Vertebrate Paleontology', 1],
    ['Megataxa', 74],
    ['PeerJ', 1],
    ['The Trustees of British Museum', 1],
    ['University of Kansas Publications, Museum of Natural History', 1],
    ['Zoological Journal of the Linnean Society', 2],
    ['Zootaxa', 23]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=112)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);