function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bennett, Edward Turner', 3],
    ['Bleeker, Pieter', 7],
    ['Bonaparte, Charles Lucien', 1],
    ['Gottsche, C. M.', 1],
    ['Heckel, J. J.', 1],
    ['Lowe, R. T.', 1],
    ['Malm, A. W.', 1],
    ['Rathke, Martin Heinrich', 2],
    ['Richardson, John', 1],
    ['Richiardi, S.', 1],
    ['Spix, J. B. von & Agassiz, Jean Louis Rodolphe', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);