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Immunohistochemical staining of NF-κB in lung tissues of rats in different groups and IOD of NF-κB expression. Results were expressed as the mean ± SEM (n = 10). Significant differences compared with the control group were designated as ∗ P < 0.05 and ∗∗ P < 0.01. Significant differences compared with the COPD group were designated as # P < 0.05.
