function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen herausgegeben von der Senckenbergischen Naturforschenden Gesellschaft', 1],
    ['Annales de la Societe Entomologique de Belgique', 16],
    ['Archiv für Naturgeschichte', 1],
    ['Biodiversity Data Journal', 13],
    ['Histoire physique, naturelle et politique de Madagascar. 20.', 2],
    ['Insect Systematics & Evolution', 13],
    ['Journal of Natural History', 8],
    ['Revue Suisse de Zoologie', 2],
    ['Revue de Zoologie Africaine', 2],
    ['Sitzungsberichte der Koenigliche Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Classe', 2],
    ['Subterranean Biology', 9],
    ['Transactions of the Entomological Society of London', 2],
    ['ZooKeys', 17],
    ['Zoosystema', 22],
    ['Zootaxa', 158],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=269)',
    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);