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Extracellular (EC)-superoxide dismutase (SOD) preserves alveolar development in adult mice exposed to hyperoxia at birth. Representative hematoxylin-eosin-stained lung tissues from naïve adult wild-type (WT) and EC-SOD transgenic (EC-SOD Tg) mice exposed to room air (RA) or 100% oxygen (O2) at birth. Each image is representative of 5 mice examined/group. Scale bar = 100 μm.
