RT Journal Article SR Electronic T1 Cerebral Vascular Disease JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 387 OP 388 DO 10.1136/jnnp.41.4.387-b VO 41 IS 4 A1 R. W. Ross Russell YR 1978 UL http://jnnp.bmj.com/content/41/4/387.3.abstract AB