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Cell proliferation in the wounds of diabetic rats. (a) Immunohistochemical staining of Ki67 expression at Days 3 and 7. (b) Quantification of the Ki67-positive cells (*statistically significant, *P < 0.05, **P < 0.01 vs PLLA, &P < 0.05, &&P < 0.01 vs DSPE-PLLA, ##P < 0.01 vs blank).
