title: Von Willebrand factor activity assay errors.
authors.affiliation: Coagulation laboratory, Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.
authors.forename: A E
authors.initials: AE
authors.lastname: Bowyer
authors.affiliation: Coagulation laboratory, Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.
authors.forename: S
authors.initials: S
authors.lastname: Guy
authors.affiliation: Coagulation laboratory, Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.
authors.forename: M F
authors.initials: MF
authors.lastname: Shepherd
authors.affiliation: Coagulation laboratory, Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.
authors.forename: B M
authors.initials: BM
authors.lastname: Sampson
authors.affiliation: Coagulation laboratory, Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.
authors.forename: S
authors.initials: S
authors.lastname: Kitchen
authors.affiliation: Coagulation laboratory, Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.|Department of Cardiovascular Science, University Sheffield, Sheffield, UK.
authors.forename: M
authors.initials: M
authors.lastname: Makris
mesh_terms: D000368:Aged; D001780:Blood Coagulation Tests; D003951:Diagnostic Errors; D004338:Drug Combinations; D005169:Factor VIII / Q000627:therapeutic use; D006467:Hemophilia A / Q000150:complications / Q000175:diagnosis / Q000188:drug therapy; D006801:Humans; D008297:Male; D014841:von Willebrand Factor / Q000378:metabolism* / Q000627:therapeutic use
chemical_list: D004338:Drug Combinations; C509423:factor VIII, von Willebrand factor drug combination; D014841:von Willebrand Factor; D005169:Factor VIII