RT Journal Article SR Electronic T1 New persistent opioid use: definitions and opportunities JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 97 OP 98 DO 10.1136/rapm-2020-102121 VO 46 IS 2 A1 Lia D Delaney A1 Jennifer F Waljee YR 2021 UL http://rapm.bmj.com/content/46/2/97.abstract AB