Vitamin D and disease activity in multiple sclerosis before and during interferon-β treatment. Løken-Amsrud KI, Holmøy T, Bakke SJ, Beiske A G, Bjerve KS, Bjørnarå BT, Hovdal H, Lilleås F, Midgard R, Pedersen T, et al. Neurology. 2012 Jun 13. PMID: 22700809. Abstract CommentRecommendBookmarkWatch