function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beaufortia', 1],
    ['Bulletin de l\'Institut Royal des Sciences Naturelles de Belgique, Biologie', 1],
    ['Bulletin of Marine Science', 2],
    ['Crustaceana', 2],
    ['Journal of Marine Systems', 1],
    ['Journal of Natural History', 17],
    ['Journal of Plankton Research', 1],
    ['Journal of natural history', 1],
    ['Journal of the Marine Biological Association', 1],
    ['Mitteilungen aus dem Zoologischen Museum in Berlin', 1],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Proceedings of the Japanese Society of Systematic Zoology', 1],
    ['Zootaxa', 33]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=63)',
    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);