Acid clearing from the distal esophagus.
D004947:Esophagus / Q000503:physiopathology*; D005750:Gastric Juice; D005764:Gastroesophageal Reflux / Q000503:physiopathology*; D005769:Gastrointestinal Motility; D006548:Hernia, Diaphragmatic / Q000503:physiopathology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male