Down's syndrome and presbyacousis.
D000375:Aging; D002648:Child; D003051:Cochlea / Q000473:pathology; D004314:Down Syndrome / Q000150:complications* / Q000473:pathology; D005333:Fetus; D006311:Hearing Disorders / Q000150:complications* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged