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Nuclear fast red staining of human bone marrow stromal cell-seeded scaffolds cultured under different conditions on (A) day 7 and (B) day 14 (scale bar, 100 µm). a, Control; b, Mechanical stimulation I group; c, Mechanical stimulation II group; d, Perfusion group; e, DEX group; f, BMP-7 group. DEX, dexamethasone; BMP-7, bone morphogenetic protein-7.
