Affiliation: | B. J. Pryle, MB, BS. FRCA, Senior Registrar, Departments of Anaesthesia and Neurosurgery, Frenchay Hospital, Bristol BS16 1LE.;J. A. Carter, MB, BS, FRCA, Consultant, Departments of Anaesthesia and Neurosurgery, Frenchay Hospital, Bristol BS16 1LE.;T. Cadoux-Hudson, DPhil, FRCS, Senior Registrar, Departments of Anaesthesia and Neurosurgery, Frenchay Hospital, Bristol BS16 1LE. |