COMPARISON OF ANALGESIC EFFICACY BETWEEN INTRAVENOUS PATIENT-CONTROLLED NEFOPAM AND KETOROLAC IN POST-CESAREAN SECTION PATIENTS AT HANOI OBSTETRICS AND GYNECOLOGY HOSPITAL FROM 2024 TO 2025 . YHCĐ. 2026;67(1). doi:10.52163/yhc.v67i1.4103