RT Journal Article SR Electronic T1 Subarachnoid Haemorrhage JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 506 OP 507 DO 10.1136/jnnp.50.4.506-b VO 50 IS 4 A1 RS Maurice-Williams YR 1987 UL http://jnnp.bmj.com/content/50/4/506.3.abstract AB