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Effects of insulin (10 μM), EGF (40 ng/ml) or vehicle on keratinocytes migration in different mice after scratch wounding of 0 hr, 20 hr and 40 hr (A). The dotted line in the scratched area represents the limit of cell migration. The continuous line indicates the border of the scratched area. (B) Quantitative expression of the effects of insulin, EGF and mitomycin C on the keratinocytes migration. “+” treated in the groups, “-” without treatment.
