function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin de la Société Impériale des Naturalistes de Moscou', 1],
    ['Check List', 3],
    ['European Journal of Taxonomy', 18],
    ['Geodiversitas', 2],
    ['Insecta Mundi', 8],
    ['Journal of Natural History', 5],
    ['Papéis Avulsos de Zoologia', 79],
    ['Raffles Bulletin of Zoology', 2],
    ['Revue suisse de Zoologie', 35],
    ['Verhandelingen van de Hollandse Maatschappij van Wetenschappen, Haarlem', 2],
    ['ZooKeys', 4],
    ['Zoologia', 2],
    ['Zoological Journal of the Linnean Society', 17],
    ['Zoosystema', 2],
    ['Zootaxa', 90]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=270)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);