RT Journal Article SR Electronic T1 Proceedings of the 121st Meeting of the Society of British Neurological Surgeons held jointly with the Deutsche Gesselschaft für Neurochirurgie, Hull, 23-26 September 1992 JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 570 OP 575 DO 10.1136/jnnp.56.5.570 VO 56 IS 5 YR 1993 UL http://jnnp.bmj.com/content/56/5/570.abstract AB