title: Limited knowledge and recall of common staging systems: can we rely on what the clinical record tells us about retraction of the tympanic membrane?
authors.forename: D D
authors.initials: DD
authors.lastname: Pothier
authors.forename: C
authors.initials: C
authors.lastname: Cooke
authors.forename: S B
authors.initials: SB
authors.lastname: Ahmed
mesh_terms: D018424:Cholesteatoma, Middle Ear / Q000473:pathology* / Q000601:surgery*; D002983:Clinical Competence; D006801:Humans; D009367:Neoplasm Staging / Q000379:methods*; D014432:Tympanic Membrane / Q000473:pathology* / Q000601:surgery*