2026. 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. Vietnam Journal of Community Medicine. 67, 1 (Jan. 2026). DOI:https://doi.org/10.52163/yhc.v67i1.4111.