function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 1],
    ['American Museum Novitates', 1],
    ['Biodiversity Data Journal', 2],
    ['Current Herpetology', 3],
    ['Fossil Record', 6],
    ['Geodiversitas', 12],
    ['Herpetozoa', 1],
    ['Joan Thomae', 3],
    ['Journal of Natural History', 2],
    ['Natural History Bulletin of the Siam Society', 1],
    ['Palaeontologia Electronica', 4],
    ['Panckoucke', 1],
    ['ZooKeys', 6],
    ['Zoological Journal of the Linnean Society', 20],
    ['Zootaxa', 56],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=125)',
    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);