function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des Naturhistorischen Museums in Wien', 2],
    ['Annales de la Societe Entomologique de Belgique', 17],
    ['Annales de la Societe Entomologique de Belgique, Comptes-rendus des Seances', 2],
    ['Annales de la Société Entomologique de France', 15],
    ['Beiträge Zur Entomologie = Contributions to Entomology', 2],
    ['Berliner Entomologische Zeitschrift', 2],
    ['Biodiversity Data Journal', 9],
    ['Bulletin of the American Museum of Natural History', 4],
    ['Deutsche Entomologische Zeitschrift', 6],
    ['Entomologische Mitteilungen', 3],
    ['Journal of the Bombay Natural History Society', 7],
    ['Mitteilungen der Schweizerischen Entomologischen Gesellschaft', 4],
    ['Voyage de Ch. Alluaud et R. Jeannel en Afrique Orientale (1911 - 1912). Résultats scientifiques. Hyménoptères', 4],
    ['Zoosystema', 3],
    ['Zootaxa', 3],
    ['Other (20)', 31]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=114)',
    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);