title: Letter: Do refluxers have sick sphincters?
mesh_terms: D002299:Cardia / Q000503:physiopathology; D004947:Esophagus / Q000503:physiopathology*; D005764:Gastroesophageal Reflux / Q000503:physiopathology*; D006801:Humans; D009130:Muscle, Smooth / Q000503:physiopathology; D011312:Pressure