title: Hiatus hernia and esophageal contraction abnormalities.
mesh_terms: D004947:Esophagus / Q000503:physiopathology*; D006548:Hernia, Diaphragmatic / Q000503:physiopathology*; D006551:Hernia, Hiatal / Q000503:physiopathology*; D006801:Humans; D010528:Peristalsis