[Operations for improvement of hearing].
D003638:Deafness / Q000601:surgery*; D006309:Hearing; D034381:Hearing Loss; D006320:Hearing Tests; D006801:Humans; D010040:Otosclerosis / Q000601:surgery*; D014432:Tympanic Membrane / Q000601:surgery*
DEAFNESS/surgery; OTOSCLEROSIS/surgery; TYMPANIC MEMBRANE/surgery