Interferon beta-1b in secondary progressive MS: a combined analysis of the two trials. Kappos L, Weinshenker B, Pozzilli C, Thompson AJ, Dahlke F, Beckmann K, Polman C, McFarland H, European(EU-SPMS) Interferon beta-1b in Secondary Progressive Multiple Sclerosis Trial Steering Committee and Independent Advis, North American(NA-SPMS) Interferon beta-1b in Secondary Progressive Multiple Sclerosis Trial Steering Committee and Independent Neurology. 2004 Nov 23; 63(10):1779-87. PMID: 15557490. Abstract CommentRecommendBookmarkWatch