function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Koenig', 1],
    ['Acta Zoológica Lilloana', 30],
    ['Boletín del Museo Nacional de Historia Natural, Chile', 1],
    ['Bulletin of the British Ornithologists’ Club', 2],
    ['Check List', 26],
    ['Déterville', 1],
    ['G. Levrault', 2],
    ['Ibis', 1],
    ['Lynx Edicions', 4],
    ['Nouveau dictionnaire d\'histoire naturelle [ed. 2]', 2],
    ['Papéis Avulsos de Zoologia', 24],
    ['The Philosophical Magazine', 2],
    ['The Zoological Journal', 4],
    ['Zoological Journal of the Linnean Society', 5],
    ['Zootaxa', 39],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=147)',
    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);