function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anzeiger', 4],
    ['Biociências, Porto Alegre', 1],
    ['Bulletin of the United States Bureau of Fisheries', 1],
    ['Ichthyological Exploration of Freshwaters', 1],
    ['Iheringia Serie Zoologia, Serie Zoologia', 1],
    ['Memoirs of the Carnegie Museum', 3],
    ['Physis', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 5],
    ['Proceedings of the American Philosophical Society', 3],
    ['Proceedings of the Zoological Society of London, B', 1],
    ['Publications of the Field Museum of Natural History, Zoölogical', 1],
    ['Revista de Biologia Tropical', 1]
  ]);
  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);