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Figure 1 Forearm blood flow during brachial artery infusion of acetylcholine (7.5, 15 and 30 µg/min) and nitroprusside (1, 3 and 10 µg/min) in healthy control men (n = 10, open squares) and men with type II diabetes (n = 10, closed squares). p < 0.01 for the comparison of blood flow responses to acetylcholine in men with type II diabetes compared with those in control subjects by ANOVA for repeated measures.