function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 1],
    ['Bulletin de la Société Impériale des Naturalistes de Moscou', 1],
    ['Entomological Science', 4],
    ['Entomologist\'s Record and Journal of Variation', 1],
    ['Entomologist\'s gazette', 1],
    ['Entomologist’s Monthly Magazine', 5],
    ['European Journal of Taxonomy', 14],
    ['Insecta Mundi', 2],
    ['Norsk Entomologisk Tidsskrift', 4],
    ['Norwegian journal of entomology', 4],
    ['Revue de Zoologie Africaine', 7],
    ['Revue de Zoologie et de Botanique Africaines', 25],
    ['Revue suisse de zoologie', 4],
    ['The Coleopterists Bulletin', 2],
    ['Zootaxa', 66],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=145)',
    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);