title: Quality control of point of care INR devices is essential.
authors.affiliation: UK NEQAS for Blood Coagulation, Pegasus House, Sheffield S10 2QD, UK.
authors.forename: D P
authors.initials: DP
authors.lastname: Kitchen
authors.affiliation: UK NEQAS for Blood Coagulation, Pegasus House, Sheffield S10 2QD, UK.
authors.forename: S
authors.initials: S
authors.lastname: Kitchen
authors.affiliation: UK NEQAS for Blood Coagulation, Pegasus House, Sheffield S10 2QD, UK.
authors.forename: I
authors.initials: I
authors.lastname: Jennings
authors.affiliation: UK NEQAS for Blood Coagulation, Pegasus House, Sheffield S10 2QD, UK.
authors.forename: T A L
authors.initials: TA
authors.lastname: Woods
authors.affiliation: Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield S10 2JF, UK.
authors.forename: M
authors.initials: M
authors.lastname: Makris
authors.affiliation: UK NEQAS for Blood Coagulation, Pegasus House, Sheffield S10 2QD, UK.
authors.forename: I D
authors.initials: ID
authors.lastname: Walker
mesh_terms: D000925:Anticoagulants / Q000627:therapeutic use; D006801:Humans; D019934:International Normalized Ratio; D019095:Point-of-Care Systems; D011786:Quality Control; D015203:Reproducibility of Results; D014859:Warfarin
chemical_list: D000925:Anticoagulants; D014859:Warfarin