function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales du Musée Royal du Congo Belge, Série 4, Zoologiques', 1],
    ['Annales du Musée Royal du Congo Belge, Série 5, Zoologiques', 1],
    ['Indian Journal of Helminthology', 3],
    ['Japanese Journal of Zoology', 3],
    ['Johann Baptist Strobl', 1],
    ['Journal of Parasitology', 1],
    ['Philippine Journal of Science', 2],
    ['Quarterly Journal of the Geological Society, London', 2],
    ['Rev. Inst. Nac. Invest. Ciencias Nat. " Bernardino Riggi. "', 1],
    ['Roosevelt Wild Life Annals', 2],
    ['Transactions of the American Microscopical Society', 1],
    ['University of California Publications in Zoology', 2],
    ['Zeitschrift für Parasitenkunde', 1],
    ['Zootaxa', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=25)',
    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);