Increased relapse activity for multiple sclerosis natalizumab users who become nonpersistent: a retrospective study. McQueen BR, Livingston T, Vollmer T, Corboy J, Buckley B, Allen R R, Nair K, Campbell JD J Manag Care Spec Pharm. 2015 Mar; 21(3):210-8. PMID: 25726030. Abstract CommentRecommendBookmarkWatch