function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. F. Rose', 7],
    ['American Med. Philos. Reg.', 2],
    ['Annals and Magazine of Natural History', 2],
    ['Bulletin of the Museum of Comparative Zoology at Harvard College', 7],
    ['Cybium', 5],
    ['D. Carlisle', 2],
    ['European Journal of Taxonomy', 8],
    ['F. Schoell', 4],
    ['Geodiversitas', 2],
    ['Journal of Systematic Palaeontology', 2],
    ['Journal of the Academy of Natural Sciences of Philadelphia', 2],
    ['Laurentii Salvii', 2],
    ['Laurentius Salvius', 16],
    ['Mémoires de l\'Académie des Sciences de St. Pétersbourg, 7', 2],
    ['Zootaxa', 21],
    ['Other (18)', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=103)',
    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);