Status of Serum Vitamin B12 in Type 2 Diabetes Mellitus Patients under Metformin Therapy. Nepal Journal of Health Sciences, [S. l.], v. 2, n. 2, p. 9–14, 2022. DOI: 10.3126/njhs.v2i2.56784. Disponível em: https://www.nepjol.info/index.php/njhs/article/view/56784. Acesso em: 9 jul. 2026.