function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boulenger, George Albert', 9],
    ['Fowler, Henry Weed', 1],
    ['Günther, Albert Charles Lewis Gotthilf', 1],
    ['Nichols, J. T. & Griscom, L.', 1],
    ['Nichols, J. T. & La Monte, F. R.', 1],
    ['Pellegrin, J.', 2],
    ['Perugia, Alberto', 1],
    ['Peters, Wilhelm Carl Hartwig', 2],
    ['Roberts, Tyson R. & Stewart, D. J.', 1],
    ['Roman, B.', 1],
    ['Svensson, G. S. O.', 1],
    ['Thys van den Audenaerde, D. F. E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);