RT Journal Article SR Electronic T1 Futility studies JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 626 OP 627 DO 10.1212/01.wnl.0000204644.81956.65 VO 66 IS 5 A1 Schwid, Steven R. A1 Cutter, Gary R. YR 2006 UL http://n.neurology.org/content/66/5/626.abstract AB