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Figure 4 Infused (solid line) and non‐infused (dashed line) forearm blood flow in healthy controls during intrabrachial sodium nitroprusside (panel A), acetylcholine (panel B), and verapamil (panel C) with sildenafil (•) and matched placebo (○) infusion. p ⩽ 0.01 analysis of variance, dose response in infused arm; *p < 0.001 analysis of variance, sildenafil versus matched placebo.
