function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carpenter, James M.', 4],
    ['Carpenter, James M. & Brown, Graham R.', 6],
    ['Dorji, Phurpa & Nidup, Tshering & Klein, Wim & Dorji, Cheten', 1],
    ['Gawas, Sandesh M. & Kumar, Girish & Pannure, Arati', 5],
    ['Gawas, Sandesh M. & Kumar, P. Girish & Gupta, Ankita', 3],
    ['Gusenleitner, J.', 2],
    ['Li, Ting-Jing & Barthelemy, Christophe & Carpenter, James M.', 1],
    ['Nugroho, Hari & Kojima, Jun-Ichi & Ubaidillah, Rosichon', 4],
    ['Pannure, Arati & Carpenter, James M.', 2],
    ['Selis, Marco', 1],
    ['Sheikh, Altaf Hussain & Kumar, P. Girish & Thomas, Moni', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);