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 rapm-2019-100693 DO 10.1136/rapm-2019-100693 A1 Hun-Mu Yang A1 Shin Hyung Kim YR 2019 UL http://rapm.bmj.com/content/early/2019/07/05/rapm-2019-100693.abstract AB