function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft', 1],
    ['Bulletin du Musée du Caucase', 1],
    ['Bulletin of the Fan Memorial Institute of Biology', 1],
    ['Calcutta Journal of Natural History, and Miscellany of the Arts and Sciences in India', 2],
    ['Ha Noi, Scientific & Technology', 2],
    ['Izv. Akad. Nauk SSSR Otd. Mat. Est. Nauk.', 1],
    ['Lingnan Science Journal', 1],
    ['Notes from the Leyden Museum', 2],
    ['Proceedings of the Zoological Society of London, B', 2],
    ['Records of the Indian Museum', 1],
    ['Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Classe. Abteilung 1, Mineralo', 2],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=27)',
    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);