function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen Naturwissenschaftlichen Vereins zu Hamburg', 1],
    ['Anales de la Sociedad Española de Historia Natural', 1],
    ['Archiv für Naturgeschichte', 3],
    ['Calcutta Journal of Natural History, and Miscellany of the Arts and Sciences in India', 4],
    ['Cybium', 2],
    ['European Journal of Taxonomy', 2],
    ['Fujian Science & Technology Press', 2],
    ['Hoffmann', 1],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 4],
    ['Proceedings of the United States National Museum, 3', 2],
    ['Proceedings of the Zoological Society of London, B', 2],
    ['Raffles Bulletin of Zoology', 2],
    ['Species Diversity', 2],
    ['Zoological Miscellany', 2],
    ['Zootaxa', 20],
    ['Other (10)', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=60)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);