RT Journal Article SR Electronic T1 Harrison’s Principles of Internal Medicine, 16th Edition JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 1488 OP 1489 DO 10.1212/01.WNL.0000161672.02235.A0 VO 64 IS 8 A1 Anderson, David YR 2005 UL http://n.neurology.org/content/64/8/1488.abstract AB