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A: Cell numbers after cultured for 24, 48 and 72 h; B: Cell viability after cultured for 24, 48 and 72 h; C: Relative activity of ALP after 7 d and 14 d of osteoinduction; D: OCN and RUNX2 production after 21-day osteoinduction(*P<0.05;**P<0.01;***P<0.001).
