function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adumbratiunculae', 2],
    ['Biodiversity Data Journal', 18],
    ['Check List', 4],
    ['Gebauer', 2],
    ['J. Debrett', 1],
    ['J. Dixwell', 1],
    ['Laurentii Salvii', 3],
    ['Laurentius Salvius', 35],
    ['Neue nordische Beyträge', 1],
    ['Papéis Avulsos de Zoologia', 1],
    ['The Zoological Journal', 1],
    ['Zoosystema', 8],
    ['Zootaxa', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=84)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);