Effects of interferon beta-1b on cognitive performance in patients with a first event suggestive of multiple sclerosis. Penner I-K, Stemper B, Calabrese P, Freedman MS, Polman CH, Edan G, Hartung H-P, Miller DH, Montalbán X, Barkhof F, et al. Mult Scler. 2012 Apr 4. Epub 2012 Apr 04. PMID: 22492127. Abstract CommentRecommendBookmarkWatch