Small dose of ephedrine for prevention of hypotension following propofol and fentanyl administration during induction of general anesthesia. Annals of African Medical Research, [S. l.], v. 3, n. 2, 2021. DOI: 10.4081/aamr.2020.126. Disponível em: https://africa.pagepress.net/aamr/article/view/433. Acesso em: 2 may. 2026.