function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aellen, V.', 8],
    ['Cakenberghe, Victor Van & Tungaluna, Guy-Crispin Gembu', 13],
    ['Decher, Jan & Hoffmann, Anke & Schaer, Juliane', 3],
    ['Don E. Wilson & Russell A. Mittermeier', 65],
    ['Goodman, Steven M. & Schoeman, M. Corrie', 5],
    ['Huang, Joe Chun-Chia & Jazdzyk, Elly Lestari & Nusalawo, Meyner', 6],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 48],
    ['Karl F. Koopman', 54],
    ['Monadjem, Ara & Richards, Leigh & Denys, Christiane', 8],
    ['Parnaby, Harry E. & Ingleby, Sandy & Divljan, Anja', 4],
    ['Suyanto, Agustinus & Struebig, Matthew J.', 7],
    ['Thomas, Nikky M. & Duckworth, J. W. & Douangboubpha, Bounsavane', 9],
    ['Voon-Ching Lim & Rosli Ramli & Subha Bhassu & John-James Wilson', 19],
    ['Wilson, Don E. & Reeder, DeeAnn', 140],
    ['Zhang, Libiao & Jones, Gareth & Zhang, Jinshuo & Zhu, Guangjian', 5],
    ['Other (20)', 38]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=432)',
    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);