function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin of the United States Bureau of Fisheries', 2],
    ['Bulletin of the Wisconsin Natural History Society', 1],
    ['Eawag: Swiss Federal Institute of Aquatic Science and Technology', 1],
    ['Occasional Papers of the Museum of Zoology, University of Michigan', 2],
    ['Papers of the Michigan Academy of Science Arts and Letters', 1],
    ['Proceedings of the Academy of Natural Sciences of Philadelphia', 2],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Turkish Journal of Zoology', 1],
    ['ZooKeys', 24],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);