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 [Internet]. 2026 Jan. 15 [cited 2026 Sept. 9];67(1). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/4103