1.
Katoch M lal, Kour L. Retracted: Comparative evaluation of post-operative analgesic effects of intraperitoneal levobupivacaine plus fentanyl and levobupivacaine plus tramadol in patients undergoing laparoscopic cholecystectomy. Int J Clin Trials [Internet]. 2020 Jan. 24 [cited 2026 Apr. 21];7(1):28-31. Available from: https://www.ijclinicaltrials.com/index.php/ijct/article/view/375