RT Journal Article SR Electronic T1 Middle scalene tendon: a potential pitfall during supraclavicular block JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2022-103792 DO 10.1136/rapm-2022-103792 A1 Raymond Chang A1 Andrew Gray YR 2022 UL http://rapm.bmj.com/content/early/2022/06/08/rapm-2022-103792.abstract AB