function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Belgian Journal of Zoology', 1],
    ['Memoirs of Museum Victoria', 14],
    ['Memoirs of the Museum of Comparative Zoölogy, at Harvard College', 1],
    ['Papéis Avulsos de Zoologia', 2],
    ['Plankton and Benthos Reseach', 1],
    ['Proceedings of the Boston Society of Natural History', 1],
    ['Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873 – 76, Zoology', 4],
    ['Species Diversity', 2],
    ['Spolia Zoologica Musei Hauniensis', 3],
    ['ZooKeys', 3],
    ['Zoologica', 3],
    ['Zootaxa', 97]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=132)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);