function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Benjamin White and Son', 2],
    ['Biodiversity Data Journal', 6],
    ['Bulletin de la Société Zoologique de France', 1],
    ['European Journal of Taxonomy', 17],
    ['Hallageriis', 1],
    ['Journal of Natural History', 1],
    ['Laurentius Salvius', 4],
    ['Memoirs of the Australian Museum', 1],
    ['Raffles Bulletin of Zoology', 5],
    ['Transactions and proceedings of the Royal Society of New Zealand', 1],
    ['ZooKeys', 13],
    ['Zool Verh (Leiden)', 1],
    ['Zoosystema', 15],
    ['Zootaxa', 44],
    ['[G. Remondini e fl.]', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=114)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);