title: Essay on the supporting role of gravity in the development of gastroduodenal ulcer.
mesh_terms: D006112:Gravitation; D006801:Humans; D007511:Ischemia / Q000150:complications; D010437:Peptic Ulcer / Q000209:etiology*; D011187:Posture; D011859:Radiography; D013270:Stomach / Q000098:blood supply / Q000000981:diagnostic imaging