title: Six-hour food and barium retention test.
mesh_terms: D001464:Barium; D004063:Digestion; D004380:Duodenal Obstruction / Q000000981:diagnostic imaging* / Q000209:etiology; D004381:Duodenal Ulcer / Q000150:complications; D005502:Food; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011707:Pyloric Stenosis / Q000000981:diagnostic imaging* / Q000209:etiology; D011859:Radiography; D013270:Stomach / Q000502:physiology; D013276:Stomach Ulcer / Q000150:complications; D013997:Time Factors
chemical_list: D001464:Barium