Vitamin D status is negatively correlated with retinal nerve fiber layer thickness in relapsing-remitting MS patients without acute optic neuritis. Knippenberg S, Smolders J, van den Maegdenbergh M, Porro G, Damoiseaux J, Hupperts R Mult Scler. 2016 Jun 14. PMID: 27301383. Abstract CommentRecommendBookmarkWatch