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Evaluation of osteogenic differentiation for BMSCs/scaffold composites. (A) ALP activity increases for both groups at 1, 7, 14 and 21 days. (B) Expression of osteogenic genes (Alp, Bmp-2, Coll I, and Runx) for BMSCs loaded on scaffolds is up-regulated over time (*P < 0.05, **P < 0.01, or ***P < 0.001).
