function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anzeiger', 2],
    ['Bollettino dei Musei di Zoologia ed Anatomia Comparata della R. Università di Torino', 1],
    ['Check List', 3],
    ['Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien', 2],
    ['Fish Culturist', 1],
    ['Memoirs of the Carnegie Museum', 2],
    ['Memoirs of the National Academy of Sciences', 1],
    ['Oversigt over det Kongelige Danske Videnskabernes Selskabs Forhandlinger', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 3],
    ['Proceedings of the American Philosophical Society', 1],
    ['Proceedings of the Biological Society of Washington', 2],
    ['Proceedings of the United States National Museum, 3', 2],
    ['Senckenbergiana Biologica', 1],
    ['Smithsonian Contributions to Zoology', 1],
    ['Tropical Fish Hobbyist', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);