title: Assay of von Willebrand factor in von Willebrand's disease and hemophilia: use of a macroscopic platelet aggregation test.
mesh_terms: D000328:Adult; D001792:Blood Platelets / Q000187:drug effects; D002449:Cell Aggregation; D005169:Factor VIII / Q000032:analysis*; D005260:Female; D006467:Hemophilia A / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010973:Platelet Adhesiveness; D012310:Ristocetin / Q000494:pharmacology; D013997:Time Factors; D014842:von Willebrand Diseases / Q000097:blood*
chemical_list: D012310:Ristocetin; D005169:Factor VIII