RT Journal Article SR Electronic T1 Response to Dr Costa JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 340 OP 340 DO 10.1136/rapm-2021-103450 VO 47 IS 5 A1 Mejia, Jorge A1 Sala-Blanch, Xavier YR 2022 UL http://rapm.bmj.com/content/47/5/340.abstract AB