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Histological analysis of control H-CTR and S-CTR with hematoxylin-eosin staining (H-E), toluidine blue (TB), alcian blue (AB), picrosirius red (PR) and orcein (OR) histochemistry, and immunohistochemistry for type II collagen (Coll-II) and KI-67 proteins. Scale bars: 200 µm.
