function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Burridge, Chris P.', 1],
    ['De Vis, Charles Walter', 1],
    ['Delfin, F. T.', 1],
    ['Fowler, Henry Weed & Ball, S. C.', 1],
    ['Garrett, A.', 1],
    ['Hutton, F. W.', 1],
    ['Klunzinger, C. B.', 1],
    ['Laan, Richard Van Der & Eschmeyer, William N. & Fricke, Ronald', 1],
    ['Ludt, William B. & Burridge, Christopher P.', 7],
    ['Macleay, William John', 2],
    ['Norman, J. R.', 1],
    ['Richardson, John', 1],
    ['Smith, Margaret M.', 1],
    ['Steindachner, F. & Döderlein, L.', 1],
    ['de Laporte Castelnau La Ferté-Sénectère, Francis L.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);