RT Journal Article SR Electronic T1 ERRATUM JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 312 OP 312 DO 10.1136/jnnp.38.3.312-c VO 38 IS 3 YR 1975 UL http://jnnp.bmj.com/content/38/3/312.4.abstract AB