function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boulenger, George Albert', 1],
    ['Forsskål, Peter', 1],
    ['Fowler, Henry Weed', 1],
    ['Guimarães, A. R. P.', 1],
    ['Günther, Albert Charles Lewis Gotthilf', 1],
    ['Hilgendorf, F. M.', 1],
    ['Linnaeus, Carolus', 4],
    ['Pellegrin, J.', 2],
    ['Peters, Wilhelm Carl Hartwig', 6],
    ['Roberts, Tyson R.', 1],
    ['Roberts, Tyson R. & Stewart, D. J.', 1],
    ['Schilthuis, L.', 1],
    ['Steindachner, F.', 4],
    ['Vinciguerra, Decio', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);