function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin de la Société Impériale des Naturalistes de Moscou', 1],
    ['Cistula Ent', 1],
    ['Entomologist\'s gazette', 2],
    ['Entomologist’s Monthly Magazine', 6],
    ['European Journal of Taxonomy', 3],
    ['New Zealand entomologist', 2],
    ['New Zealand journal of zoology', 12],
    ['O. E. Janson & Son', 1],
    ['Revue d\'Entomologie', 1],
    ['The Coleopterists Bulletin', 3],
    ['ZooKeys', 1],
    ['Zootaxa', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);