The prognosis of the operative improvement of hearing in chronic middle ear infections.
D002908:Chronic Disease; D004432:Ear, Middle; D006309:Hearing; D006311:Hearing Disorders / Q000209:etiology*; D006320:Hearing Tests; D006801:Humans; D010033:Otitis Media / Q000150:complications*; D011379:Prognosis
HEARING DISORDERS/etiology and pathogenesis; OTITIS MEDIA/complications