function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annalen des Naturhistorischen Museums in Wien, Serie B, Botanik und Zoologie', 1],
    ['Archiv für Naturgeschichte', 1],
    ['Edinburgh encyclopaedia, conducted by David Brewster', 1],
    ['Geodiversitas', 3],
    ['Journal of Natural History', 9],
    ['Memoirs of Museum Victoria', 3],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 1],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Proceedings of the Chicago Academy of Sciences', 1],
    ['Raffles Bulletin of Zoology', 5],
    ['Report on the Scientific Results of the Voyage of H. M. S. “ Challenger ” during the Years 1873 - 76 under the Command of Captai', 3],
    ['Species Diversity', 1],
    ['ZooKeys', 3],
    ['Zoosystema', 20],
    ['Zootaxa', 142],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=197)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);