Asymptomatic lung disease caused by Mycobacterium kansasii as an opportunistic infection in a patient treated with natalizumab for relapsing-remitting multiple sclerosis. Hradilek P, Zeman D, Tudik I, Zapletalova O, Ulmann V Mult Scler. 2013 Aug 19. PMID: 23959714. Abstract CommentRecommendBookmarkWatch