function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abbott, Charles C.', 1],
    ['Ayres, W. O.', 1],
    ['Baird, S. F. & Girard, Charles Frédéric', 4],
    ['Cope, Edward Drinker', 1],
    ['Cope, Edward Drinker & Yarrow, H. C.', 1],
    ['DeMarais, B. D.', 1],
    ['Garman, S.', 1],
    ['Hubbs, Carl L. & Miller, R. R.', 1],
    ['Miller, R. R.', 1],
    ['Norris, S. M. & Fischer, J. M. & Minckley, W. L.', 1],
    ['Tanner, V. M.', 1],
    ['Williams, J. E. & Bond, C. E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);