title: Duplex scanning for carotid artery disease: is angiographic confirmation required?
mesh_terms: D002340:Carotid Artery Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002533:Cerebral Angiography / Q000009:adverse effects / Q000191:economics; D006801:Humans; D011446:Prospective Studies; D012189:Retrospective Studies; D014463:Ultrasonography / Q000009:adverse effects / Q000379:methods*