function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen aus dem Gebiete die Naturwissenschaftlichen Vereins zu Hamburg, NF', 20],
    ['African invertebrates', 8],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 7],
    ['Iberus: Revista de la Sociedad Española de Malacología', 63],
    ['Johan Christi. Trappii', 6],
    ['Memoires de la Societe geologique de France, 2', 6],
    ['Molluscan research', 6],
    ['Proceedings of the Zoological Society of London', 8],
    ['Quarterly Journal of the Geological Society, London', 32],
    ['Reports of Science Research Voyage of H. M. S. Challenger. Zoology', 30],
    ['Species Diversity', 31],
    ['Strombus', 6],
    ['U. S. Geological Survey, Professional Paper', 12],
    ['Visaya', 106],
    ['Zoological Science', 18],
    ['Other (85)', 142]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=501)',
    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);