Tissue damage within normal appearing white matter in early multiple sclerosis: assessment by the ratio of T1- and T2-weighted MR image intensity. Beer A, Biberacher V, Schmidt P, Righart R, Buck D, Berthele A, Kirschke J, Zimmer C, Hemmer B, Mühlau M J Neurol. 2016 May 13. Epub 2016 May 13. PMID: 27178000. Abstract CommentRecommendBookmarkWatch