A randomized blinded trial of combination therapy with cyclophosphamide in patients-with active multiple sclerosis on interferon beta. Smith DR, Weinstock-Guttman B, Cohen JA, Wei X, Gutmann C, Bakshi R, Olek M, Stone L, Greenberg S, Stuart D, et al. Mult Scler. 2005 Oct; 11(5):573-82. PMID: 16193896. Abstract CommentRecommendBookmarkWatch