RT Journal Article SR Electronic T1 INTERNATIONAL SYMPOSIUM ON PAIN JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 624 OP 624 DO 10.1136/jnnp.38.6.624 VO 38 IS 6 A1 P. W. Nathan YR 1975 UL http://jnnp.bmj.com/content/38/6/624.1.abstract AB