function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Archives du Muséum d\'Histoire Naturelle de Lyon', 1],
    ['Biodiversity Data Journal', 2],
    ['European Journal of Taxonomy', 1],
    ['Geodiversitas', 2],
    ['Johan. Christi. Trappii', 1],
    ['Journal of Natural History', 1],
    ['K. K. Hof-naturalien-cabinet', 1],
    ['Kansas University Geological Survey', 1],
    ['Laurentius Salvius', 30],
    ['Quarterly Journal of the Geological Society, London', 1],
    ['Transactions of the geological society of London, 2', 3],
    ['Zeitschrift der Deutschen Geologischen Gesellschaft', 1],
    ['Zootaxa', 3],
    ['[G. Remondini e fl.]', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=49)',
    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);