function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bilqees, Fatima Mujib', 4],
    ['Dhanumkumari, C.', 1],
    ['Gupta, N. K. & Sehgal, Sushil Kumar', 1],
    ['Gupta, V. & Jahan, A.', 1],
    ['Gupta, V. & Puri, M.', 1],
    ['Jehan, I.', 1],
    ['Layman, E. M.', 1],
    ['Linton, E.', 1],
    ['Manter, Harold W.', 1],
    ['Manter, Harold W. & Pritchard, M. H.', 1],
    ['Noble, Alden E. & Park, James T.', 1],
    ['Oliva, Marcelo E & Valdivia, Isabel M. & Chavez, Rosa A.', 1],
    ['Saoud, M. F. A & Ramadan, M. M. & Al Kawari, K. S. R.', 1],
    ['Siddiqi, Ather H. & Cable, Raymond M.', 2],
    ['Srivastava, H. D.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);