RT Journal Article SR Electronic T1 Pryse-Phillips replies JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 220 OP 221 DO 10.1136/jnnp.49.2.220-b VO 49 IS 2 YR 1986 UL http://jnnp.bmj.com/content/49/2/220.3.abstract AB