function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annals of the South African Museum', 3],
    ['Biodiversity Data Journal', 1],
    ['Bulletin of the Toyama Science Museum', 1],
    ['Edinburgh encyclopaedia, conducted by David Brewster', 3],
    ['Journal of Natural History', 18],
    ['Journal of crustacean biology', 1],
    ['Memoirs of the Queensland Museum', 1],
    ['Mitteilungen über Höhlen- und Karstforschung', 1],
    ['Nauplius', 2],
    ['Palaeontologia Electronica', 1],
    ['Postilla', 1],
    ['ZooKeys', 27],
    ['Zoological Journal of the Linnean Society', 2],
    ['Zoosystematics and Evolution', 17],
    ['Zootaxa', 41],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=122)',
    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);