Interferon Beta and Long-term Disability in Multiple Sclerosis. Shirani A, Zhao Y, Karim M E, Evans C, Kingwell E, van der Kop ML, Oger J, Gustafson P, Petkau J, Tremlett H JAMA Neurol. 2013 May 1; 70(5):651-3. PMID: 23699948. Abstract CommentRecommendBookmarkWatch