(Sorooshian) Research Fellow, University of Newcastle upon Tyne.
(Stafford, Wright) Senior Lecturer, University of Newcastle upon Tyne.
(Eastwood, Boyd) Senior Registrar, University of Liverpool.
(Hull) Professor, University of Newcastle upon Tyne.
Received from The Departments of Anaesthesia, University of Newcastle-upon-Tyne and University of Liverpool, United Kingdom. Submitted for publication August 3, 1995. Accepted for publication January 11, 1996. Supported by a grant from Glaxo Wellcome Co. Presented in part at the Anaesthetic Research Society, Liverpool, United Kingdom, March 25-26, 1994.
Address correspondence to Dr. Wright: Academic Department of Anaesthesia, Royal Victoria Infirmary, Newcastle-upon-Tyne, NE1 4LP, United Kingdom. Address electronic mail to: p.m.c.wright@ncl.ac.uk.