Screening for middle ear fluid in an urban pre-school population.
D000158:Acoustic Impedance Tests; D002675:Child, Preschool; D006311:Hearing Disorders / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D010033:Otitis Media / Q000175:diagnosis*; D010034:Otitis Media with Effusion / Q000150:complications / Q000175:diagnosis*; D014504:Urban Health