Progressive ataxia in a natalizumab-treated multiple sclerosis patient: the dark side of JC virus infection. Martinelli V, Dalla Costa G, Moiola L, Pavan G, Diotti RA, De Riz MA, Gerevini S, Comi G Eur J Neurol. 2016 Jul; 23(7):e39-40. PMID: 27272110. Abstract CommentRecommendBookmarkWatch