function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 7],
    ['Bohley, Katharina & Winter, Pieter J. D. & Kadereit, Gudrun', 30],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Info Flora', 3],
    ['Jarvis, Charlie', 66],
    ['Klak, Cornelia & Hanáček, Pavel & Bruyns, Peter V.', 16],
    ['Klak, Cornelia & Hedderson, Terry A. & Linder, H. Peter', 56],
    ['Kott, Patricia', 2],
    ['Linnaeus, Carolus', 46],
    ['Madl, M.', 2],
    ['Manning, John & Klak, Cornelia', 3],
    ['Monniot, Françoise & Monniot, Claude', 6],
    ['Monteiro, Francisca & Costa, Esperança Da & Kissanga, Raquel', 3],
    ['Powell, Robyn F. & Boatwright, James S. & Klak, Cornelia', 11],
    ['Sukhorukov, Alexander P. & Nilova, Maya V. & Erst, Andrey S.', 8],
    ['Other (12)', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=276)',
    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);