function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des kaiserlich-königlichen naturhistorischen Hofmuseums', 1],
    ['G. N. Raspe', 1],
    ['Johan. Christi. Trappii', 1],
    ['K. K. Hof-naturalien-cabinet', 1],
    ['Laurentius Salvius', 46],
    ['Memoires de la Societe geologique de France, 2', 1],
    ['Millan, B. White, Elmsley & Robson', 4],
    ['Quarterly Journal of the Geological Society, London', 5],
    ['Visaya', 1],
    ['Zoosystema', 1],
    ['Zootaxa', 17],
    ['[G. Remondini e fl.]', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=80)',
    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);