function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. R. Lahiri', 2],
    ['Cowley, J.', 1],
    ['F. C. Fraser', 1],
    ['Grand, Daniel & Marinov, Milen & Jourdan, Herve & Cook, Carl', 3],
    ['K. J. Morton', 1],
    ['Legrand, Jean', 2],
    ['Lieftinck, M. A.', 2],
    ['Martin, R.', 1],
    ['SWEZEY, O. H. & WILLIAMS, F. X.', 1],
    ['Schneider, Thomas & Ikemeyer, Dietmar & Müller, Ole', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);