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Representative histological images of uncoated scaffolds seeded with rCHs (A–E) and rBM-MSCs (F–J), and FN-coated scaffolds seeded with rBM-MSC (K–O), after 21 days of in vitro chondrogenesis. Haematoxylin-Eosin (HE) (A, F, K), PAS- Alcian blue (B, G, L), Picrosirius red (PRS) (C-D, H–I, M−N), and DAPI (E, J, O) stainings, observed in bright field or under fluorescence. Magnification bar: 50 μm.
