Extensor mechanism reconstruction with allograft following total knee arthroplasty: a systematic review and meta-analysis of Achilles tendon versus extensor mechanism allografts for isolated chronic patellar tendon ruptures - Balato, G; De Franco, C; Lenzi, M; de Matteo, V; Baldini, A; Burnett, R SJ (Arch Orthop Trauma Surg, 2023)