Natalizumab-induced POU2AF1/Spi-B upregulation: A possible route for PML development. Meira M, Sievers C, Hoffmann F, Haghikia A, Rasenack M, Décard BF, Kuhle J, Derfuss T, Kappos L, Lindberg RLP Neurol Neuroimmunol Neuroinflamm. 2016 Jun; 3(3):e223. Epub 2016 Mar 31. PMID: 27088119. Abstract CommentRecommendBookmarkWatch