function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 4],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 5],
    ['Cavalcanti, Taciana B.', 5],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 2],
    ['De Wilde, Willem J. J. O. & Duyfjes, Brigitta E. E.', 22],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 3],
    ['Facco, Marlon Garlet & Cavalcanti, Taciana Barbosa', 26],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 10],
    ['Info Flora', 6],
    ['Jarvis, Charlie', 24],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 5],
    ['Linnaeus, Carolus', 15],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 4],
    ['Prasanth, Arun & Sharma, Oshin A. & Sardesai, Milind M.', 4],
    ['Waringer, Johann & Karaouzas, Ioannis & Malicky, Hans', 3],
    ['Other (26)', 34]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=172)',
    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);