Affiliation: | F. R. Lloyd Jones, BSc, FRCA, Senior Registrar Departments of Anaesthesia and ENT, UCL Hospitals NHS Trust, Mortimer Street, London WIN 8AA.;A. Hegab, MD, MS, FRCS Registrar Departments of Anaesthesia and ENT, UCL Hospitals NHS Trust, Mortimer Street, London WIN 8AA. |