NAYYAR, S. B.; DHILLON, M. K.; KUKREJA, S. Correlation of vitamin B12 deficiency with metformin therapy in type 2 diabetes mellitus patients. International Journal of Advances in Medicine, [S. l.], v. 7, n. 2, p. 200–205, 2020. DOI: 10.18203/2349-3933.ijam20196075. Disponível em: https://www.ijmedicine.com/index.php/ijam/article/view/2132. Acesso em: 17 nov. 2025.