K.M, R. ., R. . James, and M. . Shafi. “Vitamin D Levels and Microvascular Complications in Type 2 Diabetes Mellitus Patients: A Study from North Keral”. International Journal of Medical and Biomedical Studies, vol. 7, no. 4, Apr. 2023, pp. 18-25, doi:10.32553/ijmbs.v7i4.2695.