Vitamin B 12 Levels in Patients with Type 2 Diabetes Mellitus on Metformin. Asian Journal of Diabetology, [S. l.], v. 22, n. 4, p. 18–21, 2022. Disponível em: https://ojs.ijcp.in/index.php/AJD/article/view/51. Acesso em: 24 dec. 2025.