function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales du Musée du Congo Belge, Série 1, Zoologiques', 4],
    ['Bulletin de la Société Philomathique de Paris, Série 7', 5],
    ['Environmental Biology of Fishes', 1],
    ['Journal of Natural History', 27],
    ['Kungliga Svenska Vetenskapsakademiens Handlingar', 1],
    ['Mémoires de l\'Académie des Sciences de St. Pétersbourg, 7', 1],
    ['Mémoires du Muséum national d\'Histoire naturelle', 1],
    ['Notulae Naturae', 1],
    ['Proceedings of the Zoological Society of London, B', 1],
    ['Revue de Zoologie et de Botanique Africaines', 1],
    ['ZooKeys', 2],
    ['Zoosystema', 4],
    ['Zootaxa', 17]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=66)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);