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Schematic illustration of the fabrication of SA/HAexo-PLGAKGN scaffold for cartilage regeneration. (A) Preparation of SA/HAexo-PLGAKGN scaffold and its biological function; (B) gross images of the cartilage defects in different groups at weeks 4, 8, and 12 after surgery; (C) immunohistochemical staining images of cartilage defects in different groups after surgery for 4, 8, and 12 weeks [56]; Copyright 2022, John Wiley and Sons.
