RT Journal Article SR Electronic T1 Section on Neuroepidemiology JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 398 OP 398 DO 10.1212/WNL.20.4.398 VO 20 IS 4 YR 1970 UL http://n.neurology.org/content/20/4/398.abstract AB