RT Journal Article SR Electronic T1 Natalizumab discontinuation in the increasing complexity of multiple sclerosis therapy JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 1484 OP 1485 DO 10.1212/WNL.0000000000000369 VO 82 IS 17 A1 Sormani, Maria Pia A1 Stefano, Nicola De YR 2014 UL http://n.neurology.org/content/82/17/1484.abstract AB