RT Journal Article SR Electronic T1 Combined Retroclavicular Approach for Shoulder Surgery: A New Description Technique of 3-in-1 Combined Block JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 806 OP 807 DO 10.1097/AAP.0000000000000856 VO 43 IS 7 A1 Lucas Rovira A1 Jorge Úbeda A1 José de Andrés YR 2018 UL http://rapm.bmj.com/content/43/7/806.abstract AB