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Figure 4 (A) In vitro effect of plasma from healthy control subjects (C) and patients with stable angina (SA) and unstable angina (UA) on adenosine 5'-diphosphate-induced monocyte-platelet aggregation (left) and platelet P-selectin expression (right) in whole blood. (B) In vitro effect of plasma from healthy control subjects and patients with SA and UA on epinephrine-induced monocyte-platelet aggregation (left) and platelet P-selectin expression (right) in whole blood. Monocyte-platelet aggregates and platelet P-selectin expression were analyzed by flow cytometry. Analysis of variance with Newman-Keuls multicomparison test was performed.