RT Journal Article SR Electronic T1 Proceedings of the Society of British Neurological Surgeons Meeting in Liverpool, 27-28 October 1983 JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 423 OP 430 DO 10.1136/jnnp.47.4.423 VO 47 IS 4 YR 1984 UL http://jnnp.bmj.com/content/47/4/423.abstract AB