function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acarologia', 11],
    ['Bulletin International de L’Académie des Sciences de Cracovie, Classe des sciences mathématiques et naturelles', 2],
    ['Deutschlands Crustaceen, Arachniden und Myriopoden', 8],
    ['Far Eastern Entomologist', 1],
    ['Hornmilben (Oribatida) [Dahl, Tierwelt Deutschlands, Teil 76]', 50],
    ['Linzer biologische Beiträge', 2],
    ['Persian Journal of Acarology', 11],
    ['Proceedings of the Japanese Society of Systematic Zoology', 3],
    ['Soil Organisms', 1],
    ['Species Diversity', 3],
    ['ZooKeys', 7],
    ['Zoologische Mededelingen', 4],
    ['Zoosystema', 2],
    ['Zootaxa', 183],
    ['carolinea', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=292)',
    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);