title: Problems with the international normalized ratio.
authors.forename: E L
authors.initials: EL
authors.lastname: Gottfried
authors.forename: V L
authors.initials: VL
authors.lastname: Ng
authors.forename: J
authors.initials: J
authors.lastname: Levin
authors.forename: L
authors.initials: L
authors.lastname: Corash
mesh_terms: D006801:Humans; D011517:Prothrombin Time; D012015:Reference Standards; D013925:Thromboplastin / Q000592:standards*
chemical_list: D013925:Thromboplastin