function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Clerck, Carl Alexander', 3],
    ['Denis, Michael & Schiffermu ̈ ller, Ignaz', 291],
    ['Esper, Eugen Johann Christoph', 27],
    ['Fabricius, Johann Christian', 63],
    ['Geyer, Carl', 5],
    ['Haworth, Adrian Hardy', 7],
    ['Hufnagel, Johann Siegfried', 51],
    ['Hübner, Jacob', 383],
    ['Knoch, August Wilhelm', 4],
    ['Lewin, John William', 4],
    ['Linnaeus, Carolus', 145],
    ['Müller, Otto Friedrich', 5],
    ['Philpott, Alfred', 4],
    ['Scopoli, G. A.', 20],
    ['Stoll, Caspar', 22],
    ['Other (27)', 47]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=1081)',
    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);