title: Achalasia and esophageal carcinoma.
authors.forename: C M
authors.initials: CM
authors.lastname: Farr
mesh_terms: D001471:Barrett Esophagus / Q000453:epidemiology; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology*; D004931:Esophageal Achalasia / Q000453:epidemiology*; D004938:Esophageal Neoplasms / Q000453:epidemiology*; D004945:Esophagoscopy; D006801:Humans; D012307:Risk Factors