title: Roentgenographic demonstration of the Eustachian tube in chronic otitis media.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D003287:Contrast Media / Q000008:administration & dosage; D005064:Eustachian Tube / Q000000981:diagnostic imaging* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D010033:Otitis Media / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011859:Radiography
chemical_list: D003287:Contrast Media