function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales du Musée du Congo Belge, Série 1, Zoologiques', 3],
    ['Anzeiger', 3],
    ['Bulletin Inst. Fondam. Afr. Noire Sci. Nat., A', 1],
    ['Bulletin of the Museum of Comparative Zoology at Harvard College, 3', 1],
    ['Cybium', 2],
    ['Hugh Rees, Ltd.', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Proceedings of the Zoological Society of London, B', 3],
    ['Raffles Bulletin of Zoology', 1],
    ['Revue Zoologique Africaine', 2],
    ['Transactions of the Zoological Society of London', 1],
    ['Videnskabelige Meddelelser frå Dansk Naturhistorisk Forening', 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);