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NOR suppresses cartilage formation and chondrogenic differentiation of BMSCs. (A) Safranin O staining of the fracture site at 7 and 14 days post-fracture. (Scale bar, 500 μm). (B) Relative cartilage area in the fracture callus at 7, 14, and 21 days after fracture. (C) Relative bone mineral area in the fracture callus at 7 and 14 days after fracture. * p < 0.05.
