function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bailey, Reeve M. & Stewart, D. J.', 1],
    ['Boulenger, George Albert', 18],
    ['Brichard, P.', 5],
    ['Büscher, H. H.', 1],
    ['Nichols, J. T. & Griscom, L.', 1],
    ['Pellegrin, J.', 1],
    ['Poll, M.', 12],
    ['Roberts, Tyson R. & Stewart, D. J.', 1],
    ['Schelly, R. C. & Stiassny, Melanie L. J.', 2],
    ['Schilthuis, L.', 1],
    ['Staeck, W.', 1],
    ['Tougas, Stephanie & Stiassny, Melanie L. J.', 1],
    ['Trewavas, E. & Poll, M.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=48)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);