function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Societe Entomologique de Belgique', 1],
    ['Berliner Entomologische Zeitschrift', 3],
    ['Bollettino della Societa Entomologica Italiana', 3],
    ['British Museum', 10],
    ['Bulletin de la Societe Vaudoise des Sciences Naturelles', 4],
    ['Deutsche Entomologische Zeitschrift', 8],
    ['Journal of Entomology', 2],
    ['Madras Journal of Literature and Science', 5],
    ['Revista de Entomologia, São Paulo', 27],
    ['Revue Suisse de Zoologie', 1],
    ['Revue suisse de Zoologie', 2],
    ['Transactions of the Entomological Society of London (2)', 8],
    ['ZooKeys', 1],
    ['Zootaxa', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=87)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);