function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Andersen, Trine Bundgaard & Rasmussen, Silas Anselm', 3],
    ['Augsten, Mariana & Meyer, Pablo Burkowski & Freitas, Loreta B.', 1],
    ['Becherer', 1],
    ['Bruhl, Jeremy J. & Andrew, Damien D. & Palsson, Ruth', 9],
    ['Callmander, Martin W. & Durbin, Olivier D. & Lack, Hans-Walter', 1],
    ['Chase, Mark W. & Christenhusz, Maarten J. M.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 3],
    ['Info Flora', 2],
    ['Jarvis, Charlie', 7],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 2],
    ['Linnaeus, Carolus', 4],
    ['Rigo, Attila & Malatinszky, Akos & Barina, Zoltan', 2],
    ['Santilli, Ludovica & Perez, Fernanda & Schrevel, Claire De', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);