function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 2],
    ['Desjardins, Émilie & Lai, Sandra & Payette, Serge & Dubé, Martin', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 10],
    ['Info Flora', 13],
    ['Jeanmonod, Daniel', 2],
    ['Kirschner, Jan & Gürdal, Bahar & Štěpánek, Jan & Zeisek, Vojtěch', 2],
    ['Kirschner, Jan & Štěpánek, Jan', 34],
    ['Kirschner, Jan & Štěpánek, Jan & Doostmohammadi, Moslem', 6],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 12],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 2],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 3],
    ['Uhlemann, Ingo', 25],
    ['Wolanin, Mateusz & Klichowska, Ewelina & Jedrzejczyk, Iwona', 15],
    ['Štepánek, Jan & Kirschner, Jan', 5],
    ['Štěpánek, Jan & Kirschner, Jan', 100],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=238)',
    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);