function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 16],
    ['Acta Zoologica Academiae Scientiarum Hungaricae', 1],
    ['Biodiversity Data Journal', 1],
    ['Bull. British Mus. nat. Hist., Zool. ser.', 1],
    ['Deutschlands Crustaceen, Arachniden und Myriopoden', 18],
    ['Hornmilben (Oribatida) [Dahl, Tierwelt Deutschlands, Teil 76]', 21],
    ['Linzer biologische Beiträge', 13],
    ['Persian Journal of Acarology', 23],
    ['Proceedings of the Japanese Society of Systematic Zoology', 1],
    ['Veröffentlichungen des Instituts für Meeresforschung Bremerhaven', 2],
    ['Zoological Science', 1],
    ['Zootaxa', 93],
    ['carolinea', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=195)',
    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);