title: Letter: Bleeding in von Willebrand's disease.
mesh_terms: D001780:Blood Coagulation Tests; D005169:Factor VIII / Q000032:analysis; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D010973:Platelet Adhesiveness / Q000187:drug effects; D012310:Ristocetin / Q000494:pharmacology; D014842:von Willebrand Diseases / Q000097:blood / Q000150:complications*
chemical_list: D012310:Ristocetin; D005169:Factor VIII