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Representative histological sections of different groups are shown. A: sham group; B: cadmium-exposed group; C: FMT 0.5+Cd group; D: BUD 0.25+Cd group; E: FMT 0.5+BUD 0.25+Cd group. All sections are stained with hematoxylin–eosin and shown at ×200. Arrows indicate inflammatory cell infiltration into alveoli.
