function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 7],
    ['Annals and magazine of natural history, 13', 1],
    ['Bulletin Univ Nebr State Mus', 1],
    ['International Journal of Acarology', 1],
    ['International journal of acarology', 2],
    ['Journal of Natural History', 1],
    ['Persian Journal of Acarology', 28],
    ['Proceedings of the Entomological Society of Washington', 1],
    ['Veröffentlichungen des Instituts für Meeresforschung Bremerhaven', 14],
    ['ZooKeys', 1],
    ['Zootaxa', 61]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=118)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);