title: One or two stage assay for factor VIII?
mesh_terms: D001681:Biological Assay / Q000379:methods*; D002648:Child; D005069:Evaluation Studies as Topic; D005169:Factor VIII / Q000302:isolation & purification* / Q000592:standards; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D012015:Reference Standards
chemical_list: D005169:Factor VIII