function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bernice P. Bishop Museum Bulletin', 1],
    ['Biodiversity Data Journal', 2],
    ['Journal of Natural History', 1],
    ['Journal of the Academy of Natural Sciences of Philadelphia', 3],
    ['Kongl. Vetenskaps Academiens Nya Handlingar', 1],
    ['Records of the Zoological Survey of India', 1],
    ['Schultz', 1],
    ['The Bulletin of the Russian Far East Malacological Society', 4],
    ['Transactions of the Wagner Free Institute of Science of Philadelphia', 1],
    ['Transactions of the geological society of London, 2', 1],
    ['Visaya', 1],
    ['ZooKeys', 1],
    ['Zootaxa', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=19)',
    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);