function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Catalogue of the Birds in the British Museum', 2],
    ['Check List', 31],
    ['Deterville', 1],
    ['Garnery', 1],
    ['Isis von Oken', 2],
    ['Journal of Natural History', 4],
    ['Linzer biologische Beiträge', 1],
    ['Lynx Edicions', 1],
    ['Moscou', 1],
    ['Papéis Avulsos de Zoologia', 14],
    ['R. and J. E. Taylor', 1],
    ['The Zoological Journal', 4],
    ['Trabajos del Instituto Espanol de Oceanografia', 1],
    ['Zootaxa', 26]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=90)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);