function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anales de la Universidad de Chile, Memorias Cientificas y Literarias', 1],
    ['Annale van die Suid-Afrikaanse Museum [Annals of the South African Museum]', 8],
    ['Bulletin de la Société Philomathique de Paris, Série 8', 1],
    ['Giornale di Scienze, Lettere ed Arti per la Sicilia', 1],
    ['J. L. B. Smith Institute of Ichthyology Special Publication', 1],
    ['K. Danske Vidensk. Selsk. Naturvid. Math. Afhandl.', 1],
    ['Kungliga Svenska Vetenskapsakademiens Handlingar', 1],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 2],
    ['Revue et Magasin de Zoologie, Série 2', 1],
    ['Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaften Classe', 2],
    ['Western Australian Fisheries Bulletin', 1],
    ['Zoological Journal of the Linnean Society', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=23)',
    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);