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VEGF expression levels in the five groups. (A) Representative western blots for VEGF at the indicated time-points. (B) Number of VEGF-positive cells for the indicated time-points as determined by immunofluorescence staining. *Significant difference compared with groups A and B. †Significant difference compared with groups A, B and D. ‡Significant difference compared with groups A–D. VEGF, vascular endothelial growth factor; d, day.
