RT Journal Article SR Electronic T1 Analgesic efficacy of adding the iPACK to adductor canal block in the presence or absence of periarticular local anesthetic infiltration in total knee arthroplasty JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 141 OP 142 DO 10.1136/rapm-2021-102898 VO 47 IS 2 A1 Min Yi A1 Bin Shen YR 2022 UL http://rapm.bmj.com/content/47/2/141.abstract AB