title: [The effect of chronic middle ear inflammation on the development of the mastoid air cell system--an experimental study].
mesh_terms: D000367:Age Factors; D000818:Animals; D002908:Chronic Disease; D008416:Mastoid / Q000166:cytology / Q000254:growth & development*; D010033:Otitis Media / Q000503:physiopathology*; D013552:Swine