Conductive hearing losses in a day nursery population--natural history and the role of tympanometry as a screening test.
D000158:Acoustic Impedance Tests; D002656:Child Day Care Centers; D002675:Child, Preschool; D034381:Hearing Loss / Q000175:diagnosis*; D006314:Hearing Loss, Conductive / Q000175:diagnosis*; D006801:Humans; D012306:Risk