function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, W.', 1],
    ['Dorji, Phurpa & Nidup, Tshering & Klein, Wim & Dorji, Cheten', 2],
    ['Dvořák, L. & Ramel, G.', 3],
    ['Dvořák, Libor & Castro, Leopoldo', 3],
    ['Dvořák, Libor & Roberts, Stuart P. M. & Pla, Šumava Np and', 12],
    ['Ebrahimi, Ebrahim & Carpenter, James M.', 1],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 10],
    ['Gawas, Sandesh M. & Kumar, Girish & Pannure, Arati', 4],
    ['Gusenleitner, J.', 6],
    ['Kimsey, Lynn S. & Carpenter, James M.', 6],
    ['Mahmood, Khalid & Ullah, Mishkat & Aziz, Abdul', 2],
    ['Oehlke, J.', 3],
    ['Rafi, Muhammad Ather & Carpenter Muhammad Qasim, James M.', 2],
    ['Schmid, Christian', 1],
    ['Yildirim, Erol & Gusenleitner, Josef', 2],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=63)',
    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);