title: [Letter: Standardization of the Quick test. Reference thromboplastins or reference plasmas?].
mesh_terms: D006801:Humans; D010949:Plasma; D011517:Prothrombin Time / Q000379:methods / Q000592:standards*; D011786:Quality Control; D013925:Thromboplastin
chemical_list: D013925:Thromboplastin
vernacular_title: Standardisierung des Quick-Testes. Referenz-Thromboplastine oder Referenz-Plasmen?