title: Long-standing oral ulcers: proposal for a new 'S-C-D classification system'.
authors.forename: Dimitris
authors.initials: D
authors.lastname: Triantos
mesh_terms: D002908:Chronic Disease; D003937:Diagnosis, Differential; D006801:Humans; D019226:Oral Ulcer / Q000145:classification* / Q000175:diagnosis / Q000209:etiology*