title: The evolution of achalasia.
authors.forename: Donald O
authors.initials: DO
authors.lastname: Castell
mesh_terms: D004931:Esophageal Achalasia / Q000175:diagnosis* / Q000503:physiopathology*; D015154:Esophageal Motility Disorders / Q000175:diagnosis* / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry / Q000379:methods*