Comparison of the Mean Duration of Analgesia of Intraperitoneal Bupivacaine and Ropivacaine Versus Placebo After Laparoscopic Cholecystectomy. mfm [Internet]. 2024 May 8 [cited 2026 Jul. 10];35(4). Available from: https://medicalforummonthly.com/index.php/mfm/article/view/4364