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The expression of TGF-β1, N-cadherin and VEGF (× 200). A. Negative expression of TGF-β1 protein. B. Positive expression of TGF-β1 protein. C. Negative expression of N-cadherin protein. D. Positive expression of N-cadherin protein. E. Negative expression of VEGF protein. F. Positive expression of VEGF protein.
