Clinical relevance of serum natalizumab concentration and anti-natalizumab antibodies in multiple sclerosis. Vennegoor A, Rispens T, Strijbis E M, Seewann A, Uitdehaag B M, Balk LJ, Barkhof F, Polman CH, Wolbink G, Killestein J Mult Scler. 2012 Sep 19. PMID: 22992450. Abstract CommentRecommendBookmarkWatch