Fresh osteochondral allografts for posttraumatic knee defects: long-term followup. - Gross AE; Kim W; Las Heras F; Backstein D; Safir O; Pritzker KP; Gross, A E; Kim, W; Las Heras, F; Backstein, D; Safir, O; Pritzker, K P H (Clinical Orthopaedics & Related Research®, 2008)