Fig. 6.

Quantification of alveolar crest (A), number of pulmonary vessels (B), and arterial medial wall thickness (C) determined on paraffin sections after late treatment and recovery on days 9 and 18 in RA-exposed pups injected daily with saline (open bars) or PD123319 (hatched bars) and O₂-exposed pups injected daily with saline (solid bars) or PD123319 (shaded bars). Values are expressed as means ± SE (N = 8). *P < 0.05 and ***P < 0.001 vs. age-matched O₂-exposed controls. ^ΔΔP < 0.01 and ^ΔΔΔP < 0.001 vs. own RA controls. ^δP < 0.05 and ^δδδP < 0.001 vs. own treatment controls on day 9.