function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of the American Museum of Natural History', 1],
    ['Check List', 6],
    ['Current Herpetology', 3],
    ['Fossil Record', 1],
    ['Geodiversitas', 7],
    ['Herpetological Journal', 2],
    ['Laurentius Salvius', 3],
    ['Molecular Ecology', 1],
    ['Proceedings of the California Academy of Sciences', 2],
    ['Public Library of Science, ONE', 3],
    ['ZooKeys', 3],
    ['Zoological Journal of the Linnean Society', 11],
    ['Zoosystema', 1],
    ['Zoosystematics and Evolution', 1],
    ['Zootaxa', 108]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=153)',
    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);