EFFICACY OF ULTRASOUND-GUIDED OBLIQUE SUBCOSTAL TRANSVERSUS ABDOMINIS PLANE BLOCK (OSTAP BLOCK) WITH ROPIVACAINE FOR POSTOPERATIVE ANALGESIA IN LAPAROSCOPIC CHOLECYSTECTOMY – A PROSPECTIVE OBSERVATIONAL STUDY. J Popl Ther Clin Pharmacol [Internet]. 2024 Sep. 10 [cited 2024 Sep. 28];31(9):623-31. Available from: https://jptcp.com/index.php/jptcp/article/view/7819