function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ann. Mag Natur. Hist.', 1],
    ['Annales de la Societe Entomologique de Belgique', 1],
    ['Annales de la Société Entomologique de France', 3],
    ['Bulletin of the American Museum of Natural History', 2],
    ['Deutsche Entomologische Zeitschrift', 2],
    ['Entomologische Mitteilungen', 1],
    ['Insects of Guam I', 1],
    ['Memoires de l\'Institut Francais d\'Afrique Noire', 1],
    ['Mitteilungen der Schweizerischen Entomologischen Gesellschaft', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);