RT Journal Article SR Electronic T1 Injectate spread in interfascial plane block: a microscopic finding JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 157 OP 158 DO 10.1136/rapm-2019-100693 VO 45 IS 2 A1 Hun-Mu Yang A1 Shin Hyung Kim YR 2020 UL http://rapm.bmj.com/content/45/2/157.abstract AB