function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ann. Zool. Fennici', 1],
    ['Beitr. Araneol.', 1],
    ['Biosystematics and Ecology Series', 1],
    ['Bulletin of the Museum of Comparative Zoology', 1],
    ['Bulletin of the National Science Museum, Series A (Zoology)', 1],
    ['Denisia', 1],
    ['Die Tierwelt Deutschlands', 2],
    ['Fauna Regni Hunagriae', 2],
    ['Fauna of Zheijang', 2],
    ['J. Hanhzhou Univ. (nat. Sci.)', 2],
    ['J. Inst. Polytechnics Osaka City, D', 2],
    ['Mitt. Abt. Zool. Landesmus. Joanneum', 2],
    ['Naturalis', 2],
    ['Takinawa Publishers', 2],
    ['The Spiders of Europe, a Synthesis', 2],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);