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A, Forearm blood flow response during infusion of l‐NMMA (2‐way repeated measures ANOVA: P=0.559 for exposure). B, Forearm blood flow during infusion of the vasodilators acetylcholine and sodium nitroprusside (2‐way repeated measures ANOVA: P=0.209 and P=0.613, respectively, for exposure). Data expressed as mean±SEM. l‐NMMA indicates NG‐monomethyl‐l‐arginine; ANOVA, analysis of variance; SEM, standard error of the mean.
