title: Long-term prognostic-significance of serial tympanometry. A cohort study of preschool children.
mesh_terms: D000158:Acoustic Impedance Tests / Q000379:methods*; D002648:Child; D002675:Child, Preschool; D003718:Denmark; D004427:Ear Diseases / Q000453:epidemiology / Q000517:prevention & control; D004432:Ear, Middle; D006801:Humans; D008403:Mass Screening; D011379:Prognosis; D011446:Prospective Studies