function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Societe Entomologique de Belgique', 15],
    ['Annales de la Société Entomologique de France', 5],
    ['Biodiversity Data Journal', 9],
    ['Bollettino della Societa Entomologica Italiana', 3],
    ['Bulletin of the American Museum of Natural History', 3],
    ['Deutsche Entomologische Zeitschrift', 4],
    ['Far Eastern Entomologist', 7],
    ['Histoire Physique, Naturelle et Politique de Madagascar.', 4],
    ['Reise in Ostafrika in den Jahren 1903 - 1905 mitteln der Hermann und Elise geb. Heckmann Wentzel-Stiftung ausgeführt von Profess', 4],
    ['Revue de Zoologie Africaine', 3],
    ['Transactions of the Entomological Society of London', 3],
    ['Verhandlungen der Zoologisch-Botanischen Gesellschaft in Wien', 4],
    ['Voyage de Ch. Alluaud et R. Jeannel en Afrique Orientale (1911 - 1912). Résultats scientifiques. Hyménoptères', 3],
    ['ZooKeys', 8],
    ['Zootaxa', 20],
    ['Other (16)', 22]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=117)',
    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);