function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 2],
    ['New Zealand Institute', 3],
    ['New Zealand Institute bulletin', 5],
    ['Scientific transactions of the Royal Dublin Society', 5],
    ['The zoology of the voyage of H. M. S. Erebus & Terror, under the command of Captain Sir James Clark Ross, R. N., F. R. S., durin', 1],
    ['Transactions and proceedings of the New Zealand Institute', 2],
    ['Transactions of the Royal Society of New Zealand', 1],
    ['Zootaxa', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);