RT Journal Article SR Electronic T1 Erector spinae plane block in breast surgery JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP rapm-2020-101497 DO 10.1136/rapm-2020-101497 A1 Li, Xue A1 Xu, Zhen-Zhen YR 2020 UL http://rapm.bmj.com/content/early/2020/05/28/rapm-2020-101497.abstract AB