function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annereaux, Ralph F.', 1],
    ['Bartoli, Pierre & Bray, Rodney A.', 1],
    ['Beverley-Burton, Mary & Early, G.', 1],
    ['Bray, Rodney A. & Justine, Jean-Lou', 2],
    ['Cribb, Thomas H. & Wright, Trudy & Bray, Rodney A.', 1],
    ['Hine, P. M.', 1],
    ['Linton, E.', 1],
    ['Machida, Masaaki', 1],
    ['Machida, Masaaki & Kuramochi, Toshiaki', 1],
    ['Madhavi, R.', 1],
    ['Manter, Harold W.', 1],
    ['McFarlane, S. Hanford', 1],
    ['Pritchard, M. H.', 1],
    ['Toman, Gerd', 1],
    ['Yamaguti, S.', 9],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    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);