function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 1],
    ['British Museum (Natural History)', 1],
    ['Bulletin U S Fish Comm', 1],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 1],
    ['Check List', 3],
    ['Edinburgh encyclopaedia, conducted by David Brewster', 1],
    ['European Journal of Taxonomy', 4],
    ['Journal of Natural History', 2],
    ['PeerJ', 3],
    ['Raffles Bulletin of Zoology', 2],
    ['Report on the Scientific Results of the Voyage of H. M. S. “ Challenger ” during the Years 1873 - 76 under the Command of Captai', 5],
    ['Zoological Journal of the Linnean Society', 8],
    ['Zoological Systematics', 32],
    ['Zoosystema', 18],
    ['Zootaxa', 221],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=308)',
    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);