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Figure 1 Dorsal Hand Vein Responses to Acetylcholine and SFLLRN (After Pre-Constriction With Norepinephrine)

Before (blue triangles) and after (red triangles) endothelial denudation. *p < 0.05; NS = nonsignificant (p = 0.09); presence versus absence of the endothelium (analysis of variance).