function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['African Invertebrates', 1],
    ['Annalen des kaiserlich-königlichen naturhistorischen Hofmuseums', 1],
    ['Archives du Muséum d\'Histoire Naturelle de Lyon', 2],
    ['Biodiversity Data Journal', 4],
    ['Geodiversitas', 3],
    ['Hallageriis', 2],
    ['Johan. Christi. Trappii', 1],
    ['K. K. Hof-naturalien-cabinet', 1],
    ['Laurentii Salvii', 1],
    ['Laurentius Salvius', 33],
    ['Quarterly Journal of the Geological Society, London', 1],
    ['Skinner and Co.', 2],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=58)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);