Comparative effectiveness of early Natalizumab treatment in JC virus-negative relapsing-remitting multiple sclerosis. Campbell JD, McQueen BR, Miravalle A, Corboy JR, Ackermann RT, Vollmer TL, Nair K Am J Manag Care. 2013; 19(4):278-85. PMID: 23725360. Abstract CommentRecommendBookmarkWatch