Butt, M.A., Arman, A. and Ansari, T. 2022. FREQUENCY OF 25-HYDROXY VITAMIN D DEFICIENCY IN PATIENTS WITH MULTIPLE SCLEROSIS. KHYBER MEDICAL UNIVERSITY JOURNAL. 14, 1 (Mar. 2022), 42–6. DOI:https://doi.org/10.35845/kmuj.2022.22039.