function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Palaeontologica Polonica', 6],
    ['Archiv für Molluskenkunde', 4],
    ['Biodiversity Data Journal', 10],
    ['Johan. Christi. Trappii', 3],
    ['Journal of Natural History', 18],
    ['Journal of the Academy of Natural Sciences of Philadelphia', 9],
    ['Laurentius Salvius', 18],
    ['Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873 – 76, Zoology', 6],
    ['The Bulletin of the Russian Far East Malacological Society', 22],
    ['Transactions of the geological society of London, 2', 5],
    ['ZooKeys', 10],
    ['Zoological Journal of the Linnean Society', 6],
    ['Zoosystema', 9],
    ['Zoosystematics and Evolution', 5],
    ['Zootaxa', 37],
    ['Other (14)', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=189)',
    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);