Analgesic efficacy of infiltration between the popliteal artery and capsule of the knee (iPACK) block added to local infiltration analgesia and continuous adductor canal block after total knee arthroplasty: a randomized clinical trial - Vichainarong, C; Kampitak, W; Tanavalee, A; Ngarmukos, S; Songborassamee, N (Reg Anesth Pain Med, 2020)