Double balloon aortic valvuloplasty in children.
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D001021:Aortic Valve / Q000473:pathology; D001024:Aortic Valve Stenosis / Q000473:pathology / Q000628:therapy*; D002404:Catheterization / Q000295:instrumentation / Q000379:methods*; D002648:Child; D005500:Follow-Up Studies; D006801:Humans