title: A radioimmunoassay for platelet factor 4.
mesh_terms: D001779:Blood Coagulation Factors / Q000032:analysis*; D006350:Heart Valve Prosthesis; D006801:Humans; D010974:Platelet Aggregation; D010978:Platelet Factor 4 / Q000032:analysis*; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D001779:Blood Coagulation Factors; D010978:Platelet Factor 4