1. D.F. Johnston, FRCS, Departments of Otolaryngology and Anaesthetics, Guy's Hospital, St Thomas Street, London Bridge, London SE1 9RT.
2. S.R. Wrigley, FCAnaes, Registrars, Departments of Otolaryngology and Anaesthetics, Guy's Hospital, St Thomas Street, London Bridge, London SE1 9RT.
3. P.J. Robb, FRCS, Departments of Otolaryngology and Anaesthetics, Guy's Hospital, St Thomas Street, London Bridge, London SE1 9RT.
4. H.E. Jones, FCAnaes, Senior Registrars, Departments of Otolaryngology and Anaesthetics, Guy's Hospital, St Thomas Street, London Bridge, London SE1 9RT.