EVALUATION OF THE ANALGESIC EFFICACY AND SAFETY OF INTRATHECAL MORPHINE FOR POSTOPERATIVE PAIN MANAGEMENT AFTER COLON AND RECTAL RESECTION. YHCĐ [Internet]. 2026 Apr. 25 [cited 2026 Sept. 9];67(4). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/4892