Gastroesophageal-sphincter function.
D000752:Anemia, Pernicious / Q000503:physiopathology*; D004947:Esophagus / Q000503:physiopathology*; D006801:Humans; D009132:Muscles / Q000503:physiopathology*; D013268:Stimulation, Chemical; D013270:Stomach / Q000503:physiopathology*