function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bronner', 1],
    ['Bulletin of the Museum of Comparative Zoology at Harvard College, 3', 3],
    ['Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien', 2],
    ['Journal and Proceedings of the Asiatic Society of Bengal', 4],
    ['Memoirs of the Indian Museum', 1],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 1],
    ['Proceedings of the Linnean Society of New South Wales', 1],
    ['Report of the British Association for the Advancement of Science', 1],
    ['South African Commercial Advertiser', 1],
    ['Veit', 6],
    ['Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen', 9],
    ['Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien', 1],
    ['Zoologische Jahrbucher, Abteilung für Systematik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=32)',
    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);