Observations on the incidence of secretory otitis media in Nigerian children.
D000234:Adenoids / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D006801:Humans; D006965:Hyperplasia; D009549:Nigeria; D010034:Otitis Media with Effusion / Q000453:epidemiology*; D012220:Rhinitis / Q000453:epidemiology