function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales du Musée du Congo Belge, Série 1, Zoologiques', 1],
    ['Canadian Journal of Earth Sciences', 1],
    ['Cretaceous Research', 2],
    ['European Journal of Taxonomy', 41],
    ['Fossil Imprint', 1],
    ['Geodiversitas', 5],
    ['Isis von Oken', 1],
    ['Journal of Zoology, London', 1],
    ['Nachr. König. Ges. Wiss. Göttingen', 1],
    ['Nature', 2],
    ['Printed by order of the Trustees', 1],
    ['Proceedings of the Linnean Society of London', 1],
    ['Scientific Reports', 2],
    ['Zoological Journal of the Linnean Society', 5],
    ['Zootaxa', 4],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=70)',
    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);