function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hallageriis', 2],
    ['Journal of the Ceylon Branch of the Royal Asiatic Society', 32],
    ['Laurentius Salvius', 2],
    ['Papéis Avulsos de Zoologia', 2],
    ['Proceedings of the Malacological Society of London', 3],
    ['Proceedings of the Zoological Society of London', 40],
    ['Revue Suisse de Zoologie', 1],
    ['Transactions of the Linnean Society of London', 3],
    ['Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening i Kjøbenhavn', 1],
    ['ZooKeys', 6],
    ['Zoological Journal of the Linnean Society', 23],
    ['Zootaxa', 7],
    ['de l\'Autuer', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=123)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);