function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Collett, R.', 1],
    ['Engelhardt, R.', 1],
    ['Garman, S.', 2],
    ['Gilbert, Charles H.', 3],
    ['Goode, G. B. & Bean, T. H.', 1],
    ['Griffith, E. & Smith, C. H.', 1],
    ['Günther, Albert C. L. G.', 1],
    ['Günther, Albert Charles Lewis Gotthilf', 1],
    ['Hilgendorf, F. M.', 1],
    ['Jordan, David Starr & Richardson, R. E.', 1],
    ['Last, Peter R.', 1],
    ['Müller, J. & Henle, F. G. J.', 5],
    ['Ogilby, J. D.', 2],
    ['Saemundsson, B.', 2],
    ['van Hasselt, Johan Coenraad', 2],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);