Serum Vitamin D level and its Relationship with HbA1c in Type 2 Diabetes mellitus patients – A Comparative Study. The Insight, Dhaka, BD, v. 9, n. 01, p. 63–67, 2026. DOI: 10.5281/. Disponível em: https://bdjournals.org/insight/article/view/968. Acesso em: 29 may. 2026.