title: A test for pyloric regurgitation.
mesh_terms: D005756:Gastritis / Q000209:etiology; D005764:Gastroesophageal Reflux / Q000175:diagnosis*; D006801:Humans; D007441:Intubation, Gastrointestinal / Q000295:instrumentation; D011708:Pylorus / Q000000981:diagnostic imaging; D011859:Radiography; D013276:Stomach Ulcer