ASSESSMENT OF THE EFFECTIVENESS OF ANALGESIA AFTER UPPER EXTREMITY SURGERY IN CHILDREN WITH ULTRASOUND-GUIDED BRACHIAL PLEXUS BLOCKS AT NGHE AN OBSTETRIC AND PEDIATRIC HOSPITAL FROM 02/2022 TO 10/2022. Vietnam Journal of Community Medicine, v. 63, n. chuyên đề 3-HN Sản Nhi Nghệ An, 30 Nov.2022.