title: Gastrointestinal endoscopy.
authors.forename: L
authors.initials: L
authors.lastname: Slonim
mesh_terms: D001466:Barium Sulfate; D004064:Digestive System / Q000000981:diagnostic imaging; D016099:Endoscopy, Gastrointestinal; D006801:Humans; D011859:Radiography
chemical_list: D001466:Barium Sulfate