function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annandale, N.', 12],
    ['Barnard, Keppel Harcourt', 11],
    ['Calman, William Thomas', 4],
    ['Carriol, René-Pierre', 4],
    ['Collins, J. S. H. & Mellen, F', 5],
    ['Darwin, Charles Robert', 13],
    ['Foster, B. a.', 4],
    ['Gruvel, A.', 13],
    ['Hoek, Paulus Peronius Cato', 43],
    ['Newman, William A. & Ross, A.', 8],
    ['Nilsson-Cantell, C. a.', 10],
    ['Pilsbry, Henry A.', 52],
    ['Seguenza, G.', 4],
    ['Withers, T. H.', 24],
    ['Young, Paulo S.', 4],
    ['Other (29)', 44]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=255)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);