JAWAD, S.; MEMON, S. F.; SHAIKH, A. A.; SHAIKH, S. A.; UQAILI, A. A.; HUSSAIN, A. Vitamin D level among Patients of Inflammatory Bowel diseases and its Correlation with Severity of Disease. Annals of Punjab Medical College, v. 16, n. 3, p. 216-219, 30 Jan. 2023.