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Figure 2 Response to clopidogrel among the three tertiles of 0.5 mg/ml arachidonic acid (AA)-induced aggregation (reflecting response to aspirin). Aggregation in response to (A) 5 µmol/l and (B) 20 µmol/l adenosine diphosphate (ADP) (p = 0.006 and p = 0.0001, respectively, for difference between tertiles).
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