function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 4],
    ['Catalogue of the Birds in the British Museum', 2],
    ['Check List', 13],
    ['F. Abate', 1],
    ['G. Levrault', 3],
    ['In Commission bei T. Trautwein', 1],
    ['Isis von Oken', 1],
    ['Kongl. Vetenskaps Academiens Nya Handlingar', 1],
    ['Laurentius Salvius', 16],
    ['Nouveau dictionnaire d\'histoire naturelle [ed. 2]', 1],
    ['Papéis Avulsos de Zoologia', 5],
    ['R. and J. E. Taylor', 1],
    ['Transactions of the Linnean Society of London', 1],
    ['Zoosystema', 8],
    ['Zootaxa', 10],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=69)',
    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);