Shah AA, Islam MU, Ahmad I, et al. Intrathecal Fentanyl with Small-Dose Bupivacaine: Stable Hemodynamics in Geriatric Population Undergoing Orthopedic Surgery: Intrathecal Fentanyl with Small-Dose Bupivacaine. PBMJ. 2022;5(4):239-243. doi:10.54393/pbmj.v5i4.381