Aguirre, O Upper trunk block: description of a supraclavicular approach of upper trunk at the points of its division. [electronic resource] - British journal of anaesthesia Dec 2016 - 823-824 p. digital Publication Type: Journal Article ISSN: 1471-6771 Standard No.: 10.1093/bja/aew366 doi Subjects--Topical Terms: Brachial Plexus--anatomy & histologyHumansNerve Block--methodsShoulder Joint--anatomy & histology