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Figure 4 Time course of intraplatelet nitrotyrosine in subjects who quit smoking (group A, open bars) and subjects who resumed smoking (group B, solid bars). Note that intraplatelet nitrotyrosine was time-dependently decreased after smoking cessation; however, in the subjects who resumed smoking, intraplatelet nitrotyrosine returned to the baseline values by resmoking. *p < 0.01 vs. day 0 in group A;
p < 0.05 vs. day 0 in group B;
p < 0.05 vs. day 14 in group B.