RT Journal Article SR Electronic T1 Multiple sclerosis in North Korea and China JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 802 OP 802 DO 10.1212/WNL.17.8.802 VO 17 IS 8 A1 John S. Barlow YR 1967 UL http://n.neurology.org/content/17/8/802.abstract AB