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Lung injury score (LIS) in control rats (CTRL), in rats with metformin-treated type 2 diabetes (MET), and in rats with untreated type 2 diabetes (T2DM) and its components describing the different types of lung injuries. Each symbol represents the LIS value on a field of view. Representative images of lung sections stained with hematoxylin and eosin are also demonstrated (magnification × 400; scale bar: 50 µm). $p < 0.05 vs. CTRL; §p < 0.05 vs. MET.
