function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biblioteca de Clasicos Cubanos', 1],
    ['European Journal of Taxonomy', 4],
    ['Giornale di Scienze, Lettere ed Arti per la Sicilia', 1],
    ['J. C. Koppe', 1],
    ['Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten', 1],
    ['Journal of Natural History', 2],
    ['Journal of the Academy of Natural Sciences of Philadelphia, Second Series', 2],
    ['Laurentius Salvius', 2],
    ['Mémoires de l\'Académie des Sciences de St. Pétersbourg, 7', 1],
    ['Revue des Travaux de l\'Institut des Peches Maritimes', 1],
    ['Sanfilippo', 1],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);