function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A Synonymic Catalogue of Neuroptera Odonata, or Dragonflies. With an Appendix of fossil species', 55],
    ['Annales Societe Entomologique France', 27],
    ['Baldwin and Cradock', 4],
    ['Biodiversity Data Journal', 3],
    ['Bulletin de l\'Academie royale des sciences, des lettres et des beaux-arts de Belgique Serie 2', 4],
    ['Bulletin of the Royal Belgian Institute of Natural Sciences', 3],
    ['Mémoires de la Société Royale des Sciences de Liége', 5],
    ['Mémoires du Muséum national d\'Histoire naturelle', 3],
    ['Odonatologica', 3],
    ['Proceedings of the Royal Entomological Society of London', 6],
    ['Systematic Entomology', 6],
    ['Transactions of the Entomological Society of London', 5],
    ['Wiener Entomologische Monatschrift', 5],
    ['Zool. Med. Leiden', 9],
    ['Zootaxa', 41],
    ['Other (19)', 23]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=202)',
    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);