All‑cause Mortality among Elderly Patients Admitted to the Medical Wards of Hospitals in Africa: A Systematic Review. Nigerian Journal of Health Sciences, [S. l.], v. 15, n. 1, p. 45–51, 2023. Disponível em: https://nigerianhsjournal.ng/index.php/njhs/article/view/128. Acesso em: 25 feb. 2026.