NAND, L.; MAHTO, S.; GARG, D. K.; KUMAR, B. Vitamin B12 deficiency in patients of type 2 diabetes mellitus treated with metformin: a cross section observational study from a tertiary care centre in Sub-Himalayan region of North India. International Journal of Research in Medical Sciences, [S. l.], v. 8, n. 4, p. 1248–1253, 2020. DOI: 10.18203/2320-6012.ijrms20200997. Disponível em: https://www.msjonline.org/index.php/ijrms/article/view/7941. Acesso em: 5 dec. 2025.