function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 2],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 3],
    ['Acta Zoologica Hung.', 1],
    ['Bulletin de la Société Zoologique de France', 1],
    ['Entomologisk Tidskrift', 1],
    ['Hornmilben (Oribatida) [Dahl, Tierwelt Deutschlands, Teil 76]', 4],
    ['International journal of acarology', 1],
    ['Linzer biologische Beiträge', 1],
    ['Persian Journal of Acarology', 2],
    ['Proceedings of the Japanese Society of Systematic Zoology', 1],
    ['Zoological Science', 1],
    ['Zootaxa', 40],
    ['carolinea', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=60)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);