function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Ichthyologica et Piscatoria', 1],
    ['Anzeiger', 1],
    ['Archiv für Naturgeschichte', 1],
    ['Biologia Gallo-Hellenica', 1],
    ['Boston Journal of Natural History', 3],
    ['Cybium', 4],
    ['Eawag: Swiss Federal Institute of Aquatic Science and Technology', 2],
    ['European Journal of Taxonomy', 3],
    ['Laurentii Salvii', 5],
    ['Laurentius Salvius', 11],
    ['Nouvelles Archives du Muséum d\'Histoire Naturelle, Paris, Série 2', 5],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 4],
    ['Proceedings of the United States National Museum, 3', 3],
    ['Turkish Journal of Zoology', 2],
    ['Zootaxa', 26],
    ['Other (9)', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=81)',
    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);