Retinal degeneration in primary-progressive multiple sclerosis: A role for cortical lesions? Petracca M, Cordano C, Cellerino M, Button J, Krieger S, Vancea R, Ghassemi R, Farrell C, Miller A, Calabresi PA, et al. Mult Scler. 2016 Mar 18. PMID: 26993116. Abstract CommentRecommendBookmarkWatch