Serum 25(OH) Vitamin D levels is not associated with disability in multiple sclerosis patients: A case-control study. Nikanfar M, Taheri-Aghdam A A, Yazdani M, Shaafi S, Masoudian N, Akbari H, Youhanaee P, Abbaszadeh H Iran J Neurol. 2015 Jan 5; 14(1):17-21. PMID: 25874052. Abstract CommentRecommendBookmarkWatch