RT Journal Article SR Electronic T1 Diaphragm-sparing nerve blocks should spare the diaphragm JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2019-101259 DO 10.1136/rapm-2019-101259 A1 De Q Tran A1 Sebastián Layera A1 Daniela Bravo A1 Iver Cristi-Sánchez A1 Loreley Bermúdez A1 Julián Aliste YR 2020 UL http://rapm.bmj.com/content/early/2020/01/21/rapm-2019-101259.abstract AB