function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bericht der Senckenbergischen Naturforschenden Gesellschaft in Frankfurt am Main', 1],
    ['Bollettino di Zoologia', 2],
    ['Bulletin du Muséum National d’Histoire Naturelle, Série 4, Section A, Zoologie, Biologie et Écologie d’Animal', 1],
    ['Cahiers de Biologie Marine', 1],
    ['Comptes Rendus de l’Academie des Sciences de Paris, D', 1],
    ['Comptes rendus de l’Académie des Sciences', 1],
    ['European Journal of Taxonomy', 26],
    ['Journal of Limnology', 1],
    ['Journal of the Marine Biological Association of the United Kingdom', 1],
    ['Kieler Meeresforschungen', 1],
    ['Mikrofauna des Meeresbodens', 4],
    ['Transactions of the American Microscopical Society', 2],
    ['ZooKeys', 5],
    ['Zoosystematics and Evolution', 2],
    ['Zootaxa', 251],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=307)',
    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);