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Expression of epithelial-mesenchymal transition biomarkers in patients with COPD. (A) E-cadherin, (B) N-cadherin and (C) vimentin expression in smokers and non-smokers with or without COPD. *P<0.05 vs. non-COPD smokers and #P<0.05 vs. non-COPD non-smokers. COPD, chronic obstructive pulmonary disease; E-cadherin, epithelial cadherin; N-cadherin, neural cadherin.
