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BA improved the levels of FRC, FVC, FEV, PEF, PIF, and FEV100/FVC in the lung tissue of rats. Data were expressed as mean ± SD, n = 6. Compared with the control group, ▲P < 0.05 and ▲▲P < 0.01; compared with the COPD group, ★P < 0.05 and ★★P < 0.01.
