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Concentration-effect curves of resveratrol (upper panels) and genistein (lower panels) on the percentage of (A) NF-κB-positive cells, and the levels of (B) TNF-α and (C) MMP-9 in patients with chronic obstructive pulmonary disease. *P<0.05 and **P<0.01 vs. 0 µmol/l resveratrol or genistein. Values are presented as the mean ± standard deviation. n=5. NF-κB, nuclear factor κB; TNF-α, tumor necrosis factor-α; MMP-9, matrix metalloproteinase-9.
