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Biochemical analyses by ELISA. Released volumes of (A) TNF-α, (B) BMP-7, (C) VEGF, (D) CD31, (E) BMP-2, and (F) ALP after 10 days of implantation in the femoral head. The number of samples in all groups was five. Significant differences (p < 0.05) between the groups at each time point are denoted by different superscript letters (i.e., bars with the same letter are not significantly different).
