How reliable is the classification of cognitive impairment across different criteria in early and late stages of multiple sclerosis? Fischer M, Kunkel A, Bublak P, Faiss JH, Hoffmann F, Sailer M, Schwab M, Zettl UK, Köhler W J Neurol Sci. 2014 May 27. PMID: 24950898. Abstract CommentRecommendBookmarkWatch