RT Journal Article SR Electronic T1 Response to ‘An alternative method of establishing the first rib under ultrasound-guidance’ JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2021-103254 DO 10.1136/rapm-2021-103254 A1 Mark Friedrich B Hurdle A1 Guilherme Ferreira-Dos-Santos A1 Raul Rosario-Concepcion A1 Laura V Gil A1 Jason S Eldrige A1 Steven R Clendenen YR 2021 UL http://rapm.bmj.com/content/early/2021/11/07/rapm-2021-103254.abstract AB