function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 3],
    ['Annual Report on the New York State Museum of Natural History', 1],
    ['Biodiversity Data Journal', 114],
    ['Boletín de la Real Sociedad Española de Historia Natural', 2],
    ['Bulletin de la Société Impériale des Naturalistes de Moscou', 1],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 23],
    ['European Journal of Taxonomy', 9],
    ['Fauna norvegica', 1],
    ['Journal of Marine Biology Association of the United Kingdom', 1],
    ['Journal of Natural History', 20],
    ['Proceedings of the Biological Society of Washington', 7],
    ['Species Diversity', 3],
    ['ZooKeys', 73],
    ['Zoological Journal of the Linnean Society', 10],
    ['Zootaxa', 405],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=679)',
    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);