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Year : 2022 | Volume: 16 | Issue Number: 2 | Page: 191-196 ORIGINAL ARTICLEComparison of the efficacy of intraperitoneal instillation of butorphanol versus nalbuphine as adjuvants to ropivacaine for postoperative pain relief in patients undergoing laparoscopic cholecystectomy under general anesthesia: A randomized, double-blind placebo-controlled study Mahajan Lakshmi, Singh Arvinder Pal, Kaur Suzen Sumeet, Kumari Anita
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