X+XO-induced responses in untreated and indomethacin-treated PRA from piglets raised in A. normoxia (n= 26 untreated arteries, ●; n=10 treated arteries, □) and B. hypoxia (n=21 untreated arteries, ●; n=8 treated arteries, □) and X+XO-induced responses in untreated and dazoxiben-treated PRA from piglets raised in C. normoxia (n= 26 untreated arteries, ●, solid line; n=5 treated arteries, □) and D. hypoxia (n=26 untreated arteries, ●; n=6 treated arteries, □). All values are mean ± SEM. *p<0.05 by the linear mixed effects model.