function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Palaeontologica Polonica', 1],
    ['Bulletin of the American Museum of Natural History', 8],
    ['Bulletin of the Florida Museum of Natural History', 3],
    ['Bulletin of the Southern California Academy of Sciences', 1],
    ['Check List', 14],
    ['Fossil Imprint', 1],
    ['Geodiversitas', 2],
    ['Handbook of the Mammals of the World – Volume 1 Carnivores', 13],
    ['Litteris Reissianis', 2],
    ['Mammal Species of the World (1 st Edition)', 27],
    ['Mammal Species of the World (2 nd Edition)', 27],
    ['Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1', 54],
    ['Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873 – 76, Zoology', 3],
    ['ZooKeys', 8],
    ['Zootaxa', 7],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=172)',
    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);