Application of serum natalizumab levels during plasma exchange in MS patients with progressive multifocal leukoencephalopathy. Vennegoor A, Rispens T, Van Oosten B, Wattjes MP, Wondergem M, Teunissen CE, Van der Kleij D, Uitdehaag BMJ, Polman CH, Killestein J Mult Scler. 2014 Jul 30. PMID: 25078275. Abstract CommentRecommendBookmarkWatch