function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bowers, N. & Stauffer, J. R.', 6],
    ['Bowers, N. J. & Stauffer, J. R.', 1],
    ['Burgess, W. E.', 1],
    ['Burgess, W. E. & Axelrod, H. R.', 1],
    ['Chan, Jeffery C. F. & Tsang, Alphonse H. F. & Yau, Sze-man', 1],
    ['Eccles, D. H.', 1],
    ['Johnson, D. S.', 5],
    ['Konings, Adrianus F. & Stauffer, Jay R.', 4],
    ['Konings-Dudin, Gertrud & Konings, Adrianus F.', 3],
    ['Konings-Dudin, Gertrud & Konings, Adrianus F. & Stauffer, Jay R.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);