function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carpenter, K.', 1],
    ['Carr, T. D.', 1],
    ['Carr, T. D. & Williamson, T. E.', 1],
    ['Christopher A. Brochu', 1],
    ['Currie, P. J.', 1],
    ['Currie, Philip J.', 1],
    ['Holtz, T. R.', 1],
    ['Holtz, TR jr.', 3],
    ['Russell, Dale A.', 2],
    ['Thomas D. Carr & David J. Varricchio & Jayc C. Sedlmayr', 2],
    ['Voris, Jared T. & Therrien, François & Zelenitsky, Darla K.', 1],
    ['Warshaw, Elías A. & Fowler, Denver W.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);