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Mean response time and mean fit for on-transient vasodilator kinetics to exercise (15% of maximal voluntary contraction) under control conditions and following PDE-5 inhibition with oral sildenafil citrate (SDF). Data are reported as means ± SE. PDE-5 inhibition alone did not alter time to steady-state vasodilation with SDF alone (A and B: MRT, P = 0.896).
