Graded epidural anesthesia for open cholecystectomy in elderly patient with ischemic heart disease. Indian Journal of Case Reports, [S. l.], v. 7, n. 10, p. 452–454, 2021. DOI: 10.32677/ijcr.v7i10.3085. Disponível em: https://mansapublishers.com/ijcr/article/view/3085. Acesso em: 5 dec. 2025.