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Histology (A) and morphometric analyses (B) of lung tissues from pups nursed by dams fed control or DHA diets and exposed to RA or O2 on d 7. (A) Histological sections revealed lung growth deficits due to hyperoxia exposure. Photos were taken at 100× magnification. Alveolar number data were natural ln-transformed prior to analysis and back transformed for the figure. Data are means ± SEM, n = 4–7 pups (2–4 litter pairs, 2–4 litters).
