function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 4],
    ['Bulletin des Sciences Naturelles et de Géologie', 1],
    ['Check List', 8],
    ['G. E. Beer', 21],
    ['Gottl. August. Lange', 1],
    ['Laurentius Salvius', 8],
    ['Mémoires de la Société d’Histoire Naturelle de Paris', 1],
    ['Nouveau dictionnaire d\'histoire naturelle [ed. 2]', 1],
    ['Proceedings of the Zoological Society of London', 1],
    ['Raffles Bulletin of Zoology', 1],
    ['Transactions of the Linnean Society of London', 2],
    ['Utrecht', 2],
    ['Zoosystema', 8],
    ['Zoosystematics and Evolution', 2],
    ['Zootaxa', 3],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=66)',
    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);