function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 10],
    ['Biodiversity Data Journal', 9],
    ['Bulletin of the Museum of Comparative Zoology at Harvard College', 1],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 1],
    ['European Journal of Taxonomy', 6],
    ['Fauna norvegica', 2],
    ['Iberus: Revista de la Sociedad Española de Malacología', 2],
    ['Journal of Natural History', 46],
    ['Memoirs of the Australian Museum', 1],
    ['Proceedings of the Zoological Society of London', 2],
    ['Trustees of the British Museum', 1],
    ['Visaya', 11],
    ['Zoological Journal of the Linnean Society', 24],
    ['Zoosystema', 25],
    ['Zootaxa', 64]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=205)',
    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);