function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 4],
    ['Bulletin of the United States National Museum', 2],
    ['Contributions to Zoology', 1],
    ['Deterville', 2],
    ['E. J. Brill', 1],
    ['Geodiversitas', 5],
    ['Raffles Bulletin of Zoology', 1],
    ['Science Reports Tohoku Imperial University', 2],
    ['United States Government Printing Office', 1],
    ['Zitteliana', 4],
    ['ZooKeys', 5],
    ['Zoologica (Stuttgart)', 2],
    ['Zootaxa', 23]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=53)',
    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);