function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Det Kongelige Danske videnskabernes selskabs skrifter. Naturvidenskabelig og mathematisk afdeling, 4', 1],
    ['Geodiversitas', 8],
    ['Handbook of the Mammals of the World – Volume 1 Carnivores', 35],
    ['Kungliga Svenska Vetenskapsakademiens Handlingar', 1],
    ['Laurentii Salvii', 1],
    ['Laurentius Salvius', 6],
    ['Mammal Species of the World (1 st Edition)', 54],
    ['Mammal Species of the World (2 nd Edition)', 61],
    ['Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1', 109],
    ['Mammalia', 2],
    ['Proceedings of the Zoological Society of London', 2],
    ['Transactions of the Linnean Society of London', 4],
    ['Zoological Journal of the Linnean Society', 5],
    ['Zoosystema', 3],
    ['Zootaxa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=294)',
    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);