title: Von Willebrand disease San Diego, a new variant.
abstract: A reduced level of factor XII has been observed in 9 of 39 patients with von Willebrand's disease. This apparent common variant of von Willebrand's disease has not previously been described, and its significance is not known.
mesh_terms: D000328:Adult; D000368:Aged; D002648:Child; D003937:Diagnosis, Differential; D005169:Factor VIII / Q000032:analysis; D005174:Factor XII / Q000032:analysis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010974:Platelet Aggregation / Q000187:drug effects; D012310:Ristocetin / Q000494:pharmacology; D009626:Terminology as Topic; D014842:von Willebrand Diseases / Q000097:blood / Q000175:diagnosis*
chemical_list: D012310:Ristocetin; D005169:Factor VIII; D005174:Factor XII