Aggregation tracings from FVB and C57 mice. (A) Platelet-rich plasma from FVB and C57 strains of mice was stimulated with 25 μg/mL and 50 μg/mL soluble type I calf skin collagen. (B) Platelet-rich plasma from FVB and C57 strains of mice was stimulated with 0.05 μg/mL and 0.2 μg/mL cross-linked CRP.