Fig. 3

The results of H&E staining. Tissue sections were stained with hematoxylin and eosin (H&E) and examined under a light microscope (100× magnification). One representative H&E-stained section image was selected from three images taken for each group. (A) Results of H&E staining of lung tissue at different time points in INO group. (B) Results of H&E staining of lung tissue at different time points in ITS group.