function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 1],
    ['Bey dem Verfasser zu finden', 1],
    ['Biodiversity Data Journal', 1],
    ['C. G. Proft, Fil. et Soc.', 1],
    ['C. Geyer', 1],
    ['Ecologica Montenegrina', 2],
    ['Entomologisk Tidskrift', 1],
    ['European Journal of Taxonomy', 2],
    ['F. W. Forstmann', 1],
    ['Far Eastern Entomologist', 19],
    ['List of the Specimens of Lepidopterous Insects in the Collection of the British Museum', 3],
    ['ZooKeys', 15],
    ['Zoological Journal of the Linnean Society', 22],
    ['Zoosystematica Rossica', 3],
    ['Zootaxa', 666],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=745)',
    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);