function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. R. Lahiri', 1],
    ['Balinsky, B. I.', 1],
    ['Barnard, K. H.', 1],
    ['Christiansen, K. A.', 2],
    ['Christiansen, Kenneth A.', 1],
    ['Dijkstra, Klaas-Douwe B. & Kalkman, Vincent J. & Dow, Rory A.', 8],
    ['Doriath-Döhler, Aimie & Hervet, Sophie & Béthoux, Olivier', 2],
    ['G. Theischinger & J. A. L. Watson', 2],
    ['Greenwalt, Dale E. & Bechly, Günter', 3],
    ['Gyeltshen, T. & Kalkman, V. J. & Orr, A. G.', 1],
    ['K. D. P. Wilson', 1],
    ['Morton, Kenneth J.', 2],
    ['Moulds, J. A. L. Watson and M. S.', 2],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Yu, Xin & Xue, Junli', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=42)',
    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);