function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Andriollo, Tommy & Landry, Bernard & Guibert, Bastien', 1],
    ['Denis, Michael & Schiffermu ̈ ller, Ignaz', 8],
    ['Donovan, Edward', 1],
    ['Esper, Eugen Johann Christoph', 7],
    ['Fabricius, Johann Christian', 7],
    ['Fuessly, Johann Caspar', 1],
    ['Hübner, Jacob', 5],
    ['Jong, Rienk De', 1],
    ['Lewin, John William', 1],
    ['Linnaeus, Carolus', 43],
    ['Retzius, Anders Ja ̊ han', 1],
    ['Rottemburg, S. A. von', 3],
    ['Scheven, Theodor Gottlieb von', 1],
    ['Scopoli, G. A.', 1],
    ['Stoll, Caspar', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=84)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);