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 273 OP 273 DO 10.1136/rapm-2021-103254 VO 47 IS 4 A1 Hurdle, Mark Friedrich B A1 Ferreira-Dos-Santos, Guilherme A1 Rosario-Concepcion, Raul A1 Gil, Laura V A1 Eldrige, Jason S A1 Clendenen, Steven R YR 2022 UL http://rapm.bmj.com/content/47/4/273.2.abstract AB