function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adam Black', 1],
    ['Biodiversity Data Journal', 2],
    ['Dresden und Leipzig', 1],
    ['G. Levrault', 1],
    ['Historical Biology', 2],
    ['Laurentius Salvius', 3],
    ['Papéis Avulsos de Zoologia', 3],
    ['R. & J. E. Taylor', 1],
    ['Records of the Australian Museum', 4],
    ['Taylor and Francis', 1],
    ['Zootaxa', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=27)',
    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);