title: [Etiological studies of reflux esophagitis by measuring intraesophageal pressure and pH].
mesh_terms: D004942:Esophagitis, Peptic / Q000209:etiology* / Q000503:physiopathology; D004947:Esophagus / Q000503:physiopathology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011312:Pressure