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Dose-response effects of intra-arterial ET-1 on femoral artery vascular resistance in sheep exposed antenatally to betamethasone or vehicle. A: males (vehicle: n = 5; beta: n = 9), B: females (vehicle: n = 12; beta: n = 9) *P < 0.05 for ET-1 dose effect. †P < 0.05 for betamethasone treatment effect by ANOVA.
