PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd TI - Correction AID - 10.1136/jnnp.44.8.750-b DP - 1981 Aug 01 TA - Journal of Neurology, Neurosurgery & Psychiatry PG - 750--750 VI - 44 IP - 8 4099 - http://jnnp.bmj.com/content/44/8/750.3.short 4100 - http://jnnp.bmj.com/content/44/8/750.3.full SO - J Neurol Neurosurg Psychiatry1981 Aug 01; 44