function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aken’Ova, T. O.', 1],
    ['Barger, Michael A. & Esch, Gerald W.', 1],
    ['Bilqees, Fatima Mujib', 2],
    ['Blend, Charles K. & Kuramochi, Toshiaki & Dronen, Norman O.', 1],
    ['Bray, Rodney A.', 1],
    ['Derbel, Hela & Neifar, Lassad', 1],
    ['Downie, Abigail J. & Cribb, Thomas H.', 1],
    ['Gibson, David Ian', 1],
    ['Gupta, V. & Ahamad, Jamil', 3],
    ['Madhavi, R.', 2],
    ['Martin, Storm B. & Cutmore, Scott C. & Ward, Selina', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    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);