function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boulenger, George Albert', 3],
    ['Dunz, Andreas R. & Schliewen, Ulrich K.', 2],
    ['Fowler, Henry Weed', 4],
    ['Pellegrin, J.', 4],
    ['Poll, M.', 4],
    ['Roman, B.', 1],
    ['Résumé, Jacques Daget', 1],
    ['Schultz, Leonard P.', 1],
    ['Van den Bergh, E. C. & Teugels, G. G. & Coenen, E. J.', 1],
    ['Vari, Richard P. & Ferraris, Carl J.', 1],
    ['Vari, Richard P. & Géry, J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);