title: Letter: Nature of the von Willebrand factor.
mesh_terms: D001779:Blood Coagulation Factors / Q000032:analysis; D005169:Factor VIII / Q000032:analysis; D006801:Humans; D010973:Platelet Adhesiveness; D014842:von Willebrand Diseases / Q000097:blood*
chemical_list: D001779:Blood Coagulation Factors; D005169:Factor VIII