title: Letter: Oesophageal ulceration.
mesh_terms: D004935:Esophageal Diseases / Q000139:chemically induced*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D012996:Solutions; D013752:Tetracycline; D014456:Ulcer / Q000139:chemically induced*
chemical_list: D012996:Solutions; D013752:Tetracycline