function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arachnology', 1],
    ['Arthropoda Selecta', 2],
    ['Biodiversity Data Journal', 27],
    ['Boston Journal of Natural History', 1],
    ['Caucasian Entomological Bulletin', 2],
    ['Caucasiana', 1],
    ['Evolutionary Systematics', 1],
    ['Nova Caledonia. Forschungen in Neu-Caledonien und auf den Loyalty- Inseln. Recherches scientifiques en Nouvelle-Calédonie et aux', 3],
    ['Proceedings of the Zoological Society of London', 1],
    ['ZooKeys', 30],
    ['Zoological Journal of the Linnean Society', 1],
    ['Zoological Systematics', 17],
    ['Zoosystema', 9],
    ['Zoosystematics and Evolution', 1],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=103)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);