Effect of low dose intrathecal clonidine as an adjuvant to hyperbaric bupivacaine on postoperative analgesia in patients undergoing elective infra umbilical surgeries - Surve, Prachi; Dsouza, Neeta; Patil, Rajendra; Agrawal, Dheeraj Narayan; ., Anshumali (Anaesthesia, Pain & Intensive Care, 2019)