function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 1],
    ['Biodiversity Data Journal', 2],
    ['Bulletin de la Societe Vaudoise des Sciences Naturelles', 1],
    ['Fauna of New Zealand', 16],
    ['Journal of Natural History', 2],
    ['Journal of Nematology', 3],
    ['Journal of Threatened Taxa', 14],
    ['Nematology', 2],
    ['Nematropica', 1],
    ['New Zealand Journal of Science', 2],
    ['Parasites & Vectors', 1],
    ['Vestnik Zoologii', 1],
    ['Wolfgang Gerle', 1],
    ['Zoological Journal of the Linnean Society', 9],
    ['Zootaxa', 234],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=292)',
    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);