RT Journal Article SR Electronic T1 Medical Neurosciences JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 663 OP 663 DO 10.1136/jnnp.59.6.663-a VO 59 IS 6 A1 Barker, Roger YR 1995 UL http://jnnp.bmj.com/content/59/6/663.2.abstract AB