S. Rashid, K. H. Nawaz, A. Fakhr, H. Ather, F. Hakeem, and R. Yousaf, “FREQUENCY OF VITAMIN D DEFICIENCY IN PATIENTS PRESENTING WITH FIBROMYALGIA: Vitamin D Deficiency in Fibromyalgia”, PAFMJ, vol. 71, no. 5, pp. 1544–47, Oct. 2021.