function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Journal of Science', 4],
    ['Contributions to Geology, University of Wyoming', 1],
    ['Fourth Symposium on Mesozoic Terrestrial Ecosystems', 1],
    ['Géobios', 1],
    ['Journal of Paleontology', 1],
    ['Mesozoic Vertebrate Life', 1],
    ['Predatory Dinosaurs of the World', 4],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['The American Journal of Science, series 2', 2],
    ['Transactions of the American Philosophical Society', 2],
    ['Tyrannosaurus rex, the tyrant king', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=20)',
    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);