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Rathod, S.; Das, C.; Jain, T. . Comparison of Anesthetic and Analgesic Effect of Isobaric 0.5% Ropivacaine Versus Levobupivacaine With Fentanyl As Adjuvant in Lower Limb Surgeries under Spinal Anesthesia- a Randomized Double-Blind, Interventional Study. J. Appl. Pharm. Res. 2023, 11, 15-19.