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Representative optical micrographs of H&E-stained lung tissues. Mice were exposed to: (A) no ZnO; (B) 10 µg of ZnO; (C) 20 µg of ZnO nanoparticles without BLM treatment; (D) no ZnO; (E) 10 µg of ZnO and (F) 20 µg of ZnO nanoparticles with BLM treatment. Samples were collected at Day 14 after administration.
