function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annals of the Queensland Museum', 1],
    ['Anzeiger der Kaiserlichen Akademie der Wissenschaften. Mathemathisch-Naturwissenschaftliche Classe', 1],
    ['Australasian Journal of Herpetology', 2],
    ['Breviora', 2],
    ['Bulletin of the Museum of Comparative Zoology at Harvard College, 3', 1],
    ['Chelonian Conservation and Biology', 1],
    ['Geodiversitas', 5],
    ['Journal of Herpetology', 1],
    ['Megataxa', 13],
    ['PeerJ', 1],
    ['Proceedings of the Zoological Society of London', 2],
    ['ZooKeys', 1],
    ['Zoologische Abhandlungen des Staatlichen Museums für Tierkunde, Dresden', 1],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=38)',
    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);