function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bacchetta, Gianluigi & Cannas, Marcello & Peruzzi, Lorenzo', 1],
    ['Casper, S. Jost & Bussmann, Rainer W. & Henning, Tilo', 1],
    ['Gillespie, Lynn J. & Saarela, Jeffery M. & Sokoloff, Paul C.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 5],
    ['Info Flora', 8],
    ['Jarvis, Charlie', 4],
    ['Jeanmonod, Daniel', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 4],
    ['Le Brun, P.', 1],
    ['Linnaeus, Carolus', 4],
    ['Perez, Alvaro J. & Tobar, Francisco & Burgess, Kevin S.', 2],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 4],
    ['Yildirim, Hasan & Şenol, Serdar Gökhan & Pirhan, Ademi Fahri', 1],
    ['Zamudio, Sergio & Mata-Rosas, Martín', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=39)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);