no study has evaluated the diagnostic usefulness of testing for this factor , and we tested for a heparin-dependent platelet-aggregating factor in sera from ( 1 ) 14 patients with heparin-associated thrombocytopenia , ( 2 ) 14 nonthrombocytopenic controls given heparin , ( 3 ) 16 patients with consumptive thrombocytopenic disorders not associated with heparin , and ( 4 ) 13 healthy laboratory personnel .
C0040034
thrombocytopenia
C0019134
heparin