OROLU, A. K.; OGUNLADE, T. O. A hidden deficiency unveiled by hyperpigmentation: a case report of vitamin B12 deficiency. International Journal of Scientific Reports, [S. l.], v. 11, n. 4, p. 163–167, 2025. DOI: 10.18203/issn.2454-2156.IntJSciRep20250748. Disponível em: https://www.sci-rep.com/index.php/scirep/article/view/1466. Acesso em: 26 sep. 2025.