Anatomical variation of the brachial plexus roots identified during pre-procedural ultrasound for an interscalene block. Advances in Anesthesia and Pain Medicine, [S. l.], v. 4, n. 1, 2026. DOI: 10.4081/aapm.2026.60. Disponível em: https://www.aapm-journal.com/site/article/view/60. Acesso em: 27 mar. 2026.