function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Earth and Environmental Science Transactions of the Royal Society of Edinburgh', 2],
    ['Geodiversitas', 1],
    ['Journal of Natural History', 2],
    ['Journal of the Marine Biological Association of the United Kingdom', 1],
    ['Journal of the Royal Society of New Zealand', 1],
    ['Records of the Australian Museum', 1],
    ['Special Papers in Palaeontology', 2],
    ['Systematics and Biodiversity', 1],
    ['Zoosystema', 2],
    ['Zoosystematics and Evolution', 1],
    ['Zootaxa', 38]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=52)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);