S Balasegaram, J M Watson, A M C Rose, A Charlett, A J Nunn, A Rushdy, J Leese, L P Ormerod, on behalf of the Public Health Laboratory Service/British Thoracic Society/Department of Health Collaborative Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
