function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chainey, John E.', 1],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 20],
    ['Floden, Aaron J. & Knapp, Wesley M.', 8],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 6],
    ['Info Flora', 5],
    ['Jarvis, Charlie', 12],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 5],
    ['Lampley, Jayne A. & Gereau, Roy & Floden, Aaron', 1],
    ['Le Brun, P.', 1],
    ['Linnaeus, Carolus', 7],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 1],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 12],
    ['W, M.', 2],
    ['Yin, Yan & Gao, Linhui & Zhang, Xianan & Gao, Wei', 2],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=85)',
    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);