function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 41],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 6],
    ['Desjardins, Émilie & Lai, Sandra & Payette, Serge & Dubé, Martin', 5],
    ['Doumas, Panayiotis & Goula, Katerina', 3],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 49],
    ['Horák, David & Hajman, Martin & Hroneš, Michal & Pavelka, Mojmír', 3],
    ['Info Flora', 50],
    ['Jarvis, Charlie', 40],
    ['Jeanmonod, Daniel', 5],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 34],
    ['Le Brun, P.', 3],
    ['Linnaeus, Carolus', 33],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 4],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 4],
    ['Tavilla, Gianmarco & Guacchio, Emanuele Del', 4],
    ['Other (7)', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=293)',
    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);