18. THE EFFECTIVENESS OF DEXAMETHASONE AND ONDANSETRON IN PREVENTION OF POSTOPERATIVE NAUSEA AND VOMITING IN PATIENT UNDERGOING LAPAROSCOPIC CHOLESCYSTECTOMY AT GENERAL HOSPITAL OF CENTRAL HIGHLANDS. YHCĐ. 2024;65(CĐ 9 - Hội Gây mê Hồi sức). doi:10.52163/yhc.v65iCD9.1530