RT Journal Article SR Electronic T1 Retraction: Pericapsular nerve group block: an ethical and academic etiquette perspective JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP e1 OP e1 DO 10.1136/rapm-2018-100229ret VO 44 IS 5 YR 2019 UL http://rapm.bmj.com/content/44/5/e1.abstract