function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 5],
    ['Biodiversity Data Journal', 11],
    ['European Journal of Taxonomy', 15],
    ['Fauna norvegica', 2],
    ['Geodiversitas', 23],
    ['Iberus: Revista de la Sociedad Española de Malacología', 30],
    ['Meddelelser fra Dansk geologisk forening = Bulletin of the Geological Society of Denmark', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Quarterly Journal of the Geological Society, London', 1],
    ['Transactions of the American Entomological Society', 1],
    ['Venus, the Japanese Journal of Malacology', 9],
    ['ZooKeys', 11],
    ['Zoosystema', 9],
    ['Zoosystematics and Evolution', 11],
    ['Zootaxa', 99],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=231)',
    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);