function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Auk', 1],
    ['Check List', 20],
    ['Lynx Edicions', 1],
    ['Nouveau dictionnaire d\'histoire naturelle [ed. 2]', 1],
    ['Papéis Avulsos de Zoologia', 5],
    ['R. and J. E. Taylor', 1],
    ['Revista Brasileira de Ornitologia', 1],
    ['The Zoological Journal', 4],
    ['Treuttel', 2],
    ['Vertebrate Zoology', 2],
    ['Zoological Journal of the Linnean Society', 13],
    ['Zootaxa', 30]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=81)',
    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);