RT Journal Article SR Electronic T1 Reply to Dr Sidhu et al: APENG vis-à-vis PENG JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2019-101178 DO 10.1136/rapm-2019-101178 A1 Philip Peng A1 Laura Giron Arango YR 2019 UL http://rapm.bmj.com/content/early/2019/12/24/rapm-2019-101178.abstract AB