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Figure 3 CD4⁺CD28^null T-Cell Frequencies According to the Number of Acute Coronary Events

In patients with unstable angina, CD4⁺CD28^null T-cell frequency significantly increased according to the number of events occurring during the 24 months before the study enrollment: 1 versus 2 to 3 and 4 to 5 (p < 0.001; Kruskal-Wallis test). Data are presented as in Figure 2.