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Histopathologic changes in mice lung under light microscopy (hematoxylin and eosin, ×200). (a) Sham group, (b) II/R group, (c) II/R + NS group, (d) II/R + Rb1-30 group, (e) II/R + Rb1-60 group, (f) ATRA + Sham group, (g) ATRA + II/R group, and (h) ATRA + II/R + Rb1-60 group. Data are mean ± SD, n = 10; * P < 0.05 versus Sham group, # P < 0.05 versus II/R group, and $ P < 0.05 versus II/R + Rb1-60 group.
