RT Journal Article SR Electronic T1 Transverse Approach to the Erector Spinae Block JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 805 OP 805 DO 10.1097/AAP.0000000000000836 VO 43 IS 7 A1 James A. Hruschka A1 Christopher D. Arndt YR 2018 UL http://rapm.bmj.com/content/43/7/805.1.abstract AB