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Morphologic changes of the lung. A, sham group: No histologic alteration was observed. B, IR+S group: the inflammatory process was observed as represented by infiltration of leukocytes into interstitial and alveolar spaces, edema and partial destruction of the pulmonary architecture. C, IR+V group: Similar to IR+S group D, IR+E group: Lung pathology was attenuated to a great extent. Original magnification: ×400.
