Interferon-β and serum 25-hydroxyvitamin D interact to modulate relapse risk in MS. Stewart N, Simpson S, van der Mei I, Ponsonby A-L, Blizzard L, Dwyer T, Pittas F, Eyles D, Ko P, Taylor BV Neurology. 2012 Jun 13. PMID: 22700816. Abstract CommentRecommendBookmarkWatch