function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 3],
    ['Annalen des K. K. Naturhistorischen Hofmuseums in Wien', 1],
    ['Annales Historico-Naturales Musei Nationalis Hungarici', 1],
    ['Annales du Musée du Congo Belge, Série 1, Zoologiques', 1],
    ['Anzeiger', 3],
    ['Bulletin Ichthyol. Lab. Baku', 1],
    ['Bulletin de la Société Zoologique de France', 3],
    ['Bulletin du Musée Royal d\'Histoire Naturelle de Belgique', 1],
    ['Bulletin of the American Museum of Natural History', 1],
    ['Bulletin of the British Museum (Natural History), Zoology Series', 3],
    ['Folia Sci. Afr. Centr.', 1],
    ['Ichthyological Exploration of Freshwaters', 2],
    ['Proceedings of the Zoological Society of London, B', 2],
    ['Revue de Zoologie et de Botanique Africaines', 3],
    ['Sinensia', 2],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=34)',
    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);