function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Augustin Bernardi Buchha ̈ ndler', 20],
    ['Biodiversity Data Journal', 10],
    ['Evolutionary Systematics', 44],
    ['Journal of Natural History', 10],
    ['L. Salvius', 18],
    ['Laurentii Salvii', 17],
    ['Laurentius Salvius', 200],
    ['Linzer biologische Beiträge', 11],
    ['Mich. Friedr. Bartsch', 10],
    ['Nic. Th. Gravius', 13],
    ['Officina Libraria Kortii', 64],
    ['Sammlung europäischer Schmetterlinge', 14],
    ['Wolfgang Walthers', 17],
    ['Zoological Journal of the Linnean Society', 73],
    ['Zootaxa', 339],
    ['Other (43)', 83]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=943)',
    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);