function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bigelow, H. B. & Schroeder, W. C.', 4],
    ['Dolganov, V. N.', 3],
    ['Díaz de Astarloa, J. M. & Mabragaña, E.', 1],
    ['Forster, G. R.', 1],
    ['Garrick, J. A. F. & Paul, L. J.', 1],
    ['Hureau, Jean-Claude & Ozouf-Costaz, C.', 1],
    ['Ishihara, Hajime & Ishiyama, R.', 1],
    ['Ishiyama, R.', 3],
    ['Ishiyama, R. & Ishihara, Hajime', 3],
    ['Jones, Christian M. & Driggers Iii, William B.', 2],
    ['McEachran, J. D. & Last, Peter R.', 1],
    ['McEachran, J. D. & Matheson, R. E.', 3],
    ['McEachran, J. D. & Miyake, T.', 1],
    ['Stehmann, M.', 4],
    ['Stehmann, M. & Séret, B.', 1],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=32)',
    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);