function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Donnellan, S. C. & Catullo, R. A. & Rowley, J. J. L.', 2],
    ['Duellman, William E. & Marion, Angela B. & Hedges, Blair', 4],
    ['Figueroa, Alex & Low, Martyn E. Y. & Lim, Kelvin K. P.', 1],
    ['Günther, Rainer & Richards, Stephen J. & Hamidy, Amir', 1],
    ['Hoskin, Conrad J.', 1],
    ['Karin, Benjamin R. & Stubbs, Alexander L. & Arifin, Umilaela', 1],
    ['Kraus, Fred', 3],
    ['Miracle, Eulàlia Gassó & Van, Lars W. & Ostende, Den Hoek', 1],
    ['Oliver, Paul M. & Iskandar, Djoko T. & Richards, Stephen J.', 1],
    ['Parkin, Tom & Rowley, Jodi J. L. & Elliott-Tate, Jessica', 3],
    ['Richards, Stephen J. & Donnellan, Stephen C.', 1],
    ['Richards, Stephen J. & Donnellan, Stephen C. & Oliver, Paul M.', 5],
    ['Richards, Stephen J. & Oliver, Paul M.', 1],
    ['Rowley, J. J. L. & Mahony, M. J. & Hines, H. B. & Myers, S.', 3],
    ['Vörös, Judit & Wassens, Skye & Price, Luke & Hunter, David', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);