function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['American Museum Novitates', 1],
    ['Anales de la Sociedad Española de Historia Natural', 1],
    ['Journal of the Washington Academy of Sciences', 1],
    ['North Carolina Geological and Economical Survey, Raleigh', 1],
    ['Papers from the Tortugas Laboratory of the Carnegie Institute of Washington', 1],
    ['Proceedings of the California Academy of Sciences, Series 2', 1],
    ['Proceedings of the United States National Museum, 3', 1],
    ['Publications of the Field Museum of Natural History, Zoölogical', 1],
    ['Zootaxa', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);