function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Benedetto, J.', 1],
    ['Benedetto, J. & Muñoz, Diego F.', 2],
    ['Bitner, Maria Aleksandra', 3],
    ['Bitner, Maria Aleksandra & Logan, Alan', 2],
    ['Dall, William Healey', 3],
    ['Ford, S. W.', 1],
    ['Foster, William J. & Danise, Silvia & Twitchett, Richard J.', 2],
    ['Gorjansky, V. Yu.', 1],
    ['Hansen, Jesper & Holmer, Lars E.', 23],
    ['Lamarck, J. B. P. A. de M. de', 1],
    ['Mead, A. & Carlton, J. T. & Griffiths, C. L. & Rius, M.', 1],
    ['Mergl, Michal & Nolčová, Lucie', 7],
    ['Schemm-Gregory, Mena & Henriques, Maria Helena', 4],
    ['Skovsted, C. B. & Knight, I. & Balthasar, U. & Boyce, W. D.', 1],
    ['Sowerby, James DeCarle', 1],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=55)',
    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);