RT Journal Article SR Electronic T1 Response to the letter from Barash et al JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2021-103244 DO 10.1136/rapm-2021-103244 A1 Kanran Wang A1 Hong Liu YR 2021 UL http://rapm.bmj.com/content/early/2021/10/31/rapm-2021-103244.abstract AB