function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annale van die Suid-Afrikaanse Museum [Annals of the South African Museum]', 1],
    ['Anzeiger', 5],
    ['Bulletin de la Société Philomathique de Paris, Série 7', 1],
    ['Comptes Rendus Hebdomadaires des Séances de l\'Académie des Sciences, Série D, Sciences Naturelles', 1],
    ['Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten', 1],
    ['Monatsberichte der Akademie der Wissenschaft zu Berlin', 1],
    ['Proceedings of the Zoological Society of London, B', 5],
    ['Report of the British Association for the Advancement of Science', 3],
    ['Transactions of the Zoological Society of London', 1],
    ['Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen', 1],
    ['Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien', 1],
    ['Voorst', 2]
  ]);
  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);