function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 481],
    ['Birkhaeuser Verlag', 36],
    ['Bulletin of the American Museum of Natural History', 16],
    ['European Journal of Taxonomy', 133],
    ['Geodiversitas', 254],
    ['Journal of Natural History', 341],
    ['Laurentius Salvius', 59],
    ['Palaeontologia Electronica', 37],
    ['Raffles Bulletin of Zoology', 14],
    ['Species Diversity', 31],
    ['ZooKeys', 23],
    ['Zoological Journal of the Linnean Society', 37],
    ['Zoological Science', 23],
    ['Zoosystema', 32],
    ['Zootaxa', 1235],
    ['Other (25)', 82]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=2834)',
    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);