function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Societe Entomologique de Belgique', 1],
    ['Bulletin de la Societe Vaudoise des Sciences Naturelles', 1],
    ['Check List', 8],
    ['Insects of Panama and Mesoamerica: selected studies.', 17],
    ['Revista Brasileira de Biologia', 7],
    ['Revue suisse de Zoologie', 1],
    ['Studia Entomologica (N. S.)', 33],
    ['Transactions of the Entomological Society of London', 1],
    ['Trudy Russkago Entomologicheskago Obshchestva', 1],
    ['Verhandlungen der Zoologisch-Botanischen Gesellschaft in Wien', 2],
    ['Zootaxa', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=91)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);