title: Letter: Enhanced factor VIII activity in von Willebrand's disease.
mesh_terms: D001120:Arginine / Q000494:pharmacology; D001780:Blood Coagulation Tests; D001792:Blood Platelets / Q000187:drug effects; D005169:Factor VIII; D006467:Hemophilia A / Q000097:blood; D006801:Humans; D012310:Ristocetin / Q000494:pharmacology; D014667:Vasopressins / Q000494:pharmacology; D014842:von Willebrand Diseases / Q000097:blood*
chemical_list: D014667:Vasopressins; D012310:Ristocetin; D005169:Factor VIII; D001120:Arginine