function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Apud Wilhelmum Braumüller', 1],
    ['Arch. Naturg., Berlin', 1],
    ['Bolletino della Società Adriatica di Scienze Naturali in Trieste', 1],
    ['Bulletin of the United States Fish Commission', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Vidensk. Medd. Naturh. Förening i Kj 0 benhavn', 1],
    ['Zoologische Jahrbucher, Abteilung für Systematik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=7)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);