Magnesium Sulphate as an Adjuvant to Epidural Ropivacaine for Postoperative Analgesia in Patients Undergoing Vaginal Hysterectomy - Nilima Das; Maninder Kaur; Sujata Chaudhary; Mahendra Kumar; Rashmi Salhotra; Jainendra Chauhan (Academia Anesthesiologica International, 2019)