function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bamford, Marion & Pickford, Martin', 2],
    ['Coode, Mark James Elgar', 8],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 6],
    ['Diels, Friedrich Ludwig Emil', 2],
    ['Engel, Julien & Sabatier, Daniel', 2],
    ['Exell, Arthur Wallis', 15],
    ['Jarvis, Charlie', 9],
    ['Jongkind, Carel C. H.', 21],
    ['Linnaeus, Carolus', 3],
    ['Molino, Jean-François & Sabatier, Daniel & Grenand, Pierre', 18],
    ['Monteiro, Francisca & Costa, Esperança Da & Kissanga, Raquel', 13],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 17],
    ['Stiller, Michael', 4],
    ['White, J.', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2],
    ['Other (15)', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=139)',
    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);