function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Constable', 5],
    ['Abhandlungen der Deutschen Akademie der Wissenschaften zu Berlin', 1],
    ['Annales de la Société Impériale d\'Agriculture, Histoire Naturelle de Lyon', 2],
    ['Bronner', 3],
    ['Laurentius Salvius', 7],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 9],
    ['Notes from the Leyden Museum', 3],
    ['Nouveau Bulletin des Sciences, par la Société Philomathique de Paris', 3],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the Linnean Society of New South Wales', 5],
    ['Proceedings of the Zoological Society of London, B', 8],
    ['Repertorio Fisico-Natural de la Isla de Cuba', 3],
    ['Senckenbergiana Biologica', 2],
    ['Transactions of the Literary and Philosophical Society of New York', 2],
    ['Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen', 4],
    ['Other (22)', 22]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=81)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);