RT Journal Article SR Electronic T1 Merritt's Textbook of Neurology JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 595 OP 595 DO 10.1136/jnnp.60.5.595-c VO 60 IS 5 A1 Neil Robertson YR 1996 UL http://jnnp.bmj.com/content/60/5/595.4.abstract AB