function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Australian Zoologist', 1],
    ['Biodiversity Data Journal', 16],
    ['European Journal of Taxonomy', 7],
    ['Geodiversitas', 2],
    ['Iberus: Revista de la Sociedad Española de Malacología', 3],
    ['Invertebrate systematics', 1],
    ['J. P. Kraus', 1],
    ['K. K. Hof-naturalien-cabinet', 1],
    ['Laurentii Salvii', 1],
    ['Laurentius Salvius', 25],
    ['Millan, B. White, Elmsley & Robson', 2],
    ['Proceedings of the Boston Society of Natural History', 3],
    ['Quarterly Journal of the Geological Society, London', 9],
    ['Visaya', 24],
    ['Zootaxa', 514],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=614)',
    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);