RT Journal Article SR Electronic T1 NEUROLOGY IN LITERATURE JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 741 OP 741 DO 10.1136/jnnp.57.6.741 VO 57 IS 6 A1 G D Perkin YR 1994 UL http://jnnp.bmj.com/content/57/6/741.abstract AB