VERMA, V. K.; NIM, R. K.; SINGH, P. S.; KUMAR, M.; SINGH, G.; SINGH, A. K. Vitamin B12 deficiency among vegetarian and non-vegetarian diabetic population receiving prolonged Metformin based oral hypoglycemic agents therapy. International Journal of Advances in Medicine, [S. l.], v. 4, n. 4, p. 1150–1154, 2017. DOI: 10.18203/2349-3933.ijam20173249. Disponível em: https://www.ijmedicine.com/index.php/ijam/article/view/716. Acesso em: 18 nov. 2025.