function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 1],
    ['Bulletin of the American Museum of Natural History', 1],
    ['European Journal of Taxonomy', 6],
    ['Memoirs of the Museum of Comparative Zoology, at Harvard College', 1],
    ['PalArch\'s Journal of Paleontology', 1],
    ['Schmerber', 1],
    ['Voorst', 1],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zoosystematics and Evolution', 1],
    ['Zootaxa', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);