Defining secondary progressive multiple sclerosis. Lorscheider J, Buzzard K, Jokubaitis V, Spelman T, Havrdova E, Horakova D, Trojano M, Izquierdo G, Girard M, Duquette P, et al. Brain. 2016 Jul 7. PMID: 27401521. Abstract CommentRecommendBookmarkWatch