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Fibrotic area of difference groups by Masson staining (×200). Healthy ctrl. Healthy rats; Alpinetin group. Rats received Alpinetin; COPD group. Rats treated by the LPS and cigarettes; COPD + Alpinetin. Rats treated by the LPS, cigarettes and Alpinetin. QT was treated for 4 weeks. ∗∗p < .01 compared with the control group; ##p < .01 compared with COPD group
