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Real-time PCR analysis of the expression of osteogenesis-related genes in BMSCs cultured on surfaces modified with different chemical functional groups. (a) CBFA-1; (b) ALP. ☆ P < 0.05 versus the respective –CH3-modified substrate at 7 d; ◆ P < 0.05 versus the respective –CH3-modified substrate at 10 d; *P < 0.05 versus the respective –CH3-modified substrate at 14 d.
