The clinical laboratory and the esophagus.
D004576:Electromyography; D004935:Esophageal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology; D004945:Esophagoscopy; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011312:Pressure; D011859:Radiography; D011877:Radionuclide Imaging