function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amurian Zoological Journal', 3],
    ['Baltic journal of coleopterology', 2],
    ['Caucasian Entomological Bulletin', 2],
    ['Entomologica scandinavica', 3],
    ['Euroasian Entomological Journal', 7],
    ['Fauna of New Zealand', 3],
    ['Insecta Mundi', 5],
    ['Invertebrate systematics', 5],
    ['Investigaciones zoológicas chilenas', 6],
    ['Mémoires du Muséum national d\'Histoire naturelle', 5],
    ['Paleontological Journal', 12],
    ['The Coleopterists Bulletin', 2],
    ['ZooKeys', 4],
    ['Zoological Journal of the Linnean Society', 4],
    ['Zootaxa', 9],
    ['Other (3)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=76)',
    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);