Mishra, O.; Sehrawat, S.; Dey, S. To Compare the Effects and Efficacy of 0.5% Hyperbaric Levobupivacaine With Fentanyl Versus 0.5% Hyperbaric Bupivacaine With Fentanyl for Subarachnoid Block in Elderly Patients Undergoing Elective Surgeries. Int J Res Med Sci 2026, 14, 4579-4584.