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Effects of 1-h continuous infusion of either saline (baseline), niacinamide (6 mg·kg−1·min−1), BQ 123 (300 nmol/min), or niacinamide plus BQ123 on mean femoral artery vascular resistance in female sheep-treated antenatally with either vehicle (n = 5) or betamethasone (n = 5). a,bColumns with different letter superscripts are statistically significantly different by ANOVA. *P < 0.05, beta vs. vehicle.
