Caudal epidural morphine in chidren for postoperative analgesia . Annals of Medical Research, [S. l.], v. 5, n. 2, p. 0158–0161, 2021. Disponível em: http://www.annalsmedres.org/index.php/aomr/article/view/2682. Acesso em: 11 may. 2025.