Comparison of 0.5% Levobupivacaine Versus 0.5% Isobaric Levobupivacaine with 3mcg Dexmedetomidine in Spinal Anaesthesia- A Comparative Study - Rajeev Tiwari; Saurabh Misra; Shivendu Shekhar Ojha (Academia Anesthesiologica International, 2020)