Adductor canal block combined with iPACK (interspace between the popliteal artery and the capsule of the posterior knee) block vs periarticular injection for analgesia after total knee arthroplasty: a randomized noninferiority trial - Kertkiatkachorn, W; Kampitak, W; Tanavalee, A; Ngarmukos, S (J Arthroplasty, 2021)