function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 42],
    ['Annuario del Museo Zoologico della R. Università di Napoli (Nuova Serie)', 1],
    ['Biodiversity Data Journal', 64],
    ['C. G. Proft, Fil. et Soc.', 1],
    ['Check List', 18],
    ['Deutsche Entomologische Zeitschrift', 27],
    ['Edinburgh encyclopaedia, conducted by David Brewster', 1],
    ['European Journal of Taxonomy', 21],
    ['Insecta Mundi', 2],
    ['Insects of Guam II', 4],
    ['Linzer biologische Beiträge', 22],
    ['Raffles Bulletin of Zoology', 65],
    ['Reports of Science Research Voyage of H. M. S. Challenger. Zoology', 5],
    ['ZooKeys', 33],
    ['Zootaxa', 440],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=751)',
    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);