title: Middle ear disease from eustachian tube malfunction.
mesh_terms: D000413:Alaska; D004427:Ear Diseases / Q000209:etiology; D004432:Ear, Middle; D005064:Eustachian Tube / Q000503:physiopathology*; D006801:Humans; D010033:Otitis Media / Q000453:epidemiology / Q000209:etiology*