COMPARISON OF THE PAIN RELIEF EFFECT IN PAIN RELIEF IN AND AFTER HAND SURGERY IN CHILDREN OF AXILLARY LINE BRAINSYNCING WITH DIFFERENT CONCENTRATIONS OF LEVOBUPIVACAINE. YHCĐ [Internet]. 2026 Jan. 15 [cited 2026 Sept. 8];67(1). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/4111