function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of the American Museum of Natural History', 3],
    ['Check List', 1],
    ['E. J. Brill', 1],
    ['Geodiversitas', 3],
    ['Handbook of the Mammals of the World – Volume 6 Lagomorphs and Rodents I', 28],
    ['Laurentius Salvius', 8],
    ['Mammal Species of the World (1 st Edition)', 29],
    ['Mammal Species of the World (2 nd Edition)', 29],
    ['Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2', 91],
    ['Mammalia', 1],
    ['Mammalian Species', 6],
    ['P. van Cleef', 1],
    ['Printed at the Government Gazette Office', 1],
    ['Transactions of the Linnean Society of London', 2],
    ['Zootaxa', 6],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=211)',
    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);