COLLAR BUTTON TUBE FOR CHRONIC SEROUS OTITIS.
D002972:Cleft Palate; D004322:Drainage; D006801:Humans; D010033:Otitis Media; D011095:Polyethylenes; D013492:Suppuration
D011095:Polyethylenes
CLEFT PALATE; DRAINAGE; OTITIS MEDIA; POLYETHYLENES; SUPPURATION