function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['European Journal of Taxonomy', 10],
    ['F. S. Hübschmann, Monachii [= Munich] & Fleischer, Lipsiae [= Leipzig]', 1],
    ['Johan. Christi. Trappii', 1],
    ['Madras Journal of Literature and Science', 1],
    ['Memoirs of the Carnegie Museum', 1],
    ['PaleoBios', 3],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Revue des Travaux de l\'Institut des Peches Maritimes', 1],
    ['Species Diversity', 2],
    ['Wolfgang Gerle', 1],
    ['Zootaxa', 16]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=40)',
    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);