2024. EFFICACY OF ULTRASOUND-GUIDED OBLIQUE SUBCOSTAL TRANSVERSUS ABDOMINIS PLANE BLOCK (OSTAP BLOCK) WITH ROPIVACAINE FOR POSTOPERATIVE ANALGESIA IN LAPAROSCOPIC CHOLECYSTECTOMY – A PROSPECTIVE OBSERVATIONAL STUDY. Journal of Population Therapeutics and Clinical Pharmacology. 31, 9 (Sep. 2024), 623–631. DOI:https://doi.org/10.53555/3nemb660.