RT Journal Article SR Electronic T1 Plane but not so simple: ultrasound-guided plane block of the medial brachial cutaneous and intercostal brachial nerves JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 525 OP 526 DO 10.1136/rapm-2018-100054 VO 44 IS 4 A1 Hai Chuan Yu A1 Adam O Spencer A1 Ryan Vincent William Endersby YR 2019 UL http://rapm.bmj.com/content/44/4/525.abstract AB