function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Burman, Nicolaas Laurens', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Guillaumin, Andre', 1],
    ['Henderson, Murray Ross & Wyatt-Smith, John', 1],
    ['Jarvis, Charlie', 2],
    ['Kanehira, Ryozo & Hatusima, Sumihiko', 3],
    ['Lauterbach, Carl (Karl) Adolf Georg', 5],
    ['Linnaeus, Carolus', 2],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 2],
    ['Molino, Jean-François & Sabatier, Daniel & Grenand, Pierre', 1],
    ['Smith, Albert Charles', 6],
    ['Stevens, Peter Francis', 15],
    ['White, J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    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);