function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 2],
    ['Eberhard Klett et Franck', 4],
    ['F. G. Levrault', 1],
    ['Far Eastern Entomologist', 1],
    ['H. Steiner und Comp.', 1],
    ['Hallageriis', 4],
    ['Ioannis Thomae Trattner', 4],
    ['Joh. Edman', 1],
    ['Johann. Edman', 5],
    ['Laurentius Salvius', 20],
    ['Linzer biologische Beiträge', 2],
    ['Officina Libraria Kortii', 2],
    ['Raspe', 2],
    ['ZooKeys', 2],
    ['Zootaxa', 34],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=89)',
    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);