function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin Acad. R. Belge, Cl. Sci., 5', 1],
    ['Bulletin du Muséum National d’Histoire Naturelle, Série 2', 1],
    ['Bulletin du Muséum National d’Histoire Naturelle, Série 4, Section A, Zoologie, Biologie et Écologie d’Animal', 1],
    ['Copeia', 1],
    ['Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten', 1],
    ['Sci. Res. Norweg. Ant. Exped. 1927 - 1928. Oslo', 2],
    ['Stanford Ichthyological Bulletin', 1],
    ['Transactions of the Royal Society of Edinburgh', 1],
    ['Voprosy Ikhtiologii', 1],
    ['YUGNIRO Spetsial\'nyi Vypusk', 3],
    ['Zoodiversity', 6],
    ['Zootaxa', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);