title: Trace levels of factor VIII in substrate plasma.
authors.affiliation: UK Reference Laboratory for Anticoagulant Reagents and Control, Withington Hospital, Manchester.
authors.forename: C F
authors.initials: CF
authors.lastname: Hirst
authors.forename: J
authors.initials: J
authors.lastname: Hewitt
authors.forename: L
authors.initials: L
authors.lastname: Poller
mesh_terms: D001774:Blood Chemical Analysis / Q000379:methods*; D005169:Factor VIII / Q000032:analysis*; D006801:Humans; D010314:Partial Thromboplastin Time
chemical_list: D005169:Factor VIII