Technical changes leading to a new theory to replace esophageal achalasia.
D002404:Catheterization; D003679:Deglutition; D004931:Esophageal Achalasia / Q000139:chemically induced / Q000503:physiopathology*; D004935:Esophageal Diseases / Q000145:classification; D004941:Esophagitis / Q000503:physiopathology; D004947:Esophagus / Q000187:drug effects / Q000503:physiopathology*; D006801:Humans; D008365:Manometry; D008954:Models, Biological