When to remove the ventilation tube--judgement using T-tube on the time to remove the tube.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D034381:Hearing Loss / Q000628:therapy; D006801:Humans; D008297:Male; D008876:Middle Ear Ventilation / Q000295:instrumentation; D010034:Otitis Media with Effusion / Q000601:surgery*; D013997:Time Factors