Otitis media with effusion in children.
D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D002658:Developmental Disabilities / Q000209:etiology / Q000517:prevention & control; D006320:Hearing Tests / Q000379:methods; D006801:Humans; D008137:Longitudinal Studies; D010034:Otitis Media with Effusion / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery