function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 19],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 11],
    ['Chauveau, Olivier & Pastori, Tamara & Souza-Chies, Tatiana T.', 4],
    ['Goldblatt, P. & Manning, J. C. & van Wyk, P. C. V.', 8],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 10],
    ['Info Flora', 20],
    ['Jarvis, Charlie', 70],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 15],
    ['Linnaeus, Carolus', 33],
    ['Manning, John C. & Goldblatt, Peter', 152],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 11],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 4],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 16],
    ['Wijnands, Dirk Onno & Heniger, Johannes & Veldkamp, Jan Frederik', 4],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 10],
    ['Other (38)', 65]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=452)',
    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);