Effect of vitamin D(3) supplementation on peripheral B cell differentiation and isotype switching in patients with multiple sclerosis. Knippenberg S, Smolders J, Thewissen M, Peelen E, Cohen Tervaert J W, Hupperts R, Damoiseaux J Mult Scler. 2011 Dec; 17(12):1418-23. PMID: 21690147. Abstract CommentRecommendBookmarkWatch