function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Borodin, N. A.', 1],
    ['Boulenger, George Albert', 21],
    ['Gilchrist, J. D. F. & Thompson, W. Wardlaw', 5],
    ['Hilgendorf, F. M.', 3],
    ['Holly, M.', 1],
    ['Meinken, H.', 2],
    ['Nichols, J. T. & Griscom, L.', 2],
    ['Pellegrin, J.', 7],
    ['Poll, M. & Thys van den Audenaerde, D. F. E.', 1],
    ['Sauvage, H. E.', 1],
    ['Sparks, J. S.', 1],
    ['Steindachner, F.', 4],
    ['Thys van den Audenaerde, D. F. E.', 1],
    ['Trewavas, E.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=52)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);