RT Journal Article SR Electronic T1 Response to Dr Thomson’s letter JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 903 OP 904 DO 10.1136/rapm-2019-100652 VO 44 IS 9 A1 Leonardo Kapural A1 Shervin Harandi YR 2019 UL http://rapm.bmj.com/content/44/9/903.2.abstract AB