function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des K. K. Naturhistorischen Hofmuseums in Wien', 1],
    ['Annales de la Société Entomologique de France, Séries 1 - 6', 1],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Annals of the South African Museum', 2],
    ['Annals of the Transvaal Museum', 1],
    ['Cimbebasia Memoir', 1],
    ['Horæ Societatis Entomologicæ Rossicæ', 1],
    ['Izvestiya Turkestanskogo Otdela Imperatorskogo Russkogo Geograficheskogo Obshchestva', 1],
    ['Izviestiia Imperatorskoi Akademii Nauk', 1],
    ['L. Friederischen & Co.', 1],
    ['Mitteilungen aus dem Naturhistorischen Museum in Hamburg', 2],
    ['Zoologischer Anzeiger', 4],
    ['Zoology in the Middle East', 1],
    ['Zootaxa', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);