function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 1],
    ['Bulletin of the American Museum of Natural History', 57],
    ['Comptes Rendus Hebdomadaires des Séances et Mémoires de la Société de Biologie', 1],
    ['European Journal of Taxonomy', 9],
    ['Journal of Natural History', 61],
    ['New Zealand Journal of Zoology', 6],
    ['Papéis Avulsos de Zoologia', 3],
    ['Raffles Bulletin of Zoology', 36],
    ['Species Diversity', 2],
    ['Wilhelm Engelmann', 1],
    ['ZooKeys', 6],
    ['Zoosystema', 22],
    ['Zootaxa', 68]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=273)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);