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Figure 1 Impaired endothelium-dependent vasodilation in patients with hypercholesterolemia in comparison with controls. Increase in forearm blood flow (ml/min/100 ml) after the infusion of increasing doses of acetylcholine in patients with hypercholesterolemia (n = 35, solid circle) and in healthy controls (n = 19, solid box) (**p < 0.01, *p < 0.05).
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