title: Letter: Activated partial thromboplastin reagents.
mesh_terms: D001780:Blood Coagulation Tests; D006467:Hemophilia A / Q000175:diagnosis; D002836:Hemophilia B / Q000175:diagnosis; D006801:Humans; D007202:Indicators and Reagents; D008722:Methods; D013925:Thromboplastin / Q000032:analysis*
chemical_list: D007202:Indicators and Reagents; D013925:Thromboplastin