function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmad, J.', 2],
    ['Bray, Rodney A. & Cribb, Thomas H.', 1],
    ['Crowcroft, Peter W.', 1],
    ['Gupta, S. P. & Gupta, R. C.', 1],
    ['Gupta, V. & Ahmad, J.', 1],
    ['Gupta, V. & Jahan, A.', 1],
    ['Gupta, V. & Puri, M.', 1],
    ['Hafeezullah, M.', 2],
    ['Jamieson, B. G. M.', 1],
    ['King, Roy E.', 1],
    ['Lebedev, B. I.', 2],
    ['Li, Q. - k. & Zhang, R. - s. & Qiu, Z. - z.', 1],
    ['Shen, J. - w.', 2],
    ['Wang, P. - q.', 2],
    ['Yamaguti, S.', 5],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);