title: Finding control in quality control of unit-use prothrombin time tests.
authors.forename: C A
authors.initials: CA
authors.lastname: Pontius
mesh_terms: D019411:Clinical Laboratory Techniques / Q000592:standards*; D003951:Diagnostic Errors / Q000517:prevention & control*; D006801:Humans; D017410:Practice Guidelines as Topic; D011517:Prothrombin Time; D011786:Quality Control; D011933:Reagent Kits, Diagnostic / Q000592:standards*; D015203:Reproducibility of Results; D013048:Specimen Handling / Q000379:methods / Q000592:standards; D017749:Total Quality Management / Q000331:legislation & jurisprudence; D014481:United States
chemical_list: D011933:Reagent Kits, Diagnostic