function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmad, J.', 3],
    ['Bashirullah, A. K. M. & D\'Silva, J.', 2],
    ['Chauhan, B. S.', 3],
    ['Cohn, Ludwig', 2],
    ['Farooq, M. & Khanum, Z.', 2],
    ['Fischthal, Jacob H. & Thomas, J. D.', 2],
    ['Gupta, P. C. & Govind, H.', 4],
    ['Gupta, P. C. & Gupta, V. C.', 2],
    ['Gupta, P. C. & Singh, R. B.', 2],
    ['Gupta, R. C. & Gupta, S. P.', 5],
    ['Gupta, V. & Jain, N.', 3],
    ['Gupta, V. & Puri, M.', 6],
    ['Shaukat, Neelofer & Bilqees, Fatima Mujib', 3],
    ['Shen, J. - w.', 2],
    ['Yamaguti, S.', 8],
    ['Other (25)', 28]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=77)',
    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);