title: Pyloric reflux in duodenal ulceration and its relationship to smoking.
mesh_terms: D004381:Duodenal Ulcer / Q000503:physiopathology*; D006801:Humans; D011708:Pylorus / Q000503:physiopathology*; D012907:Smoking / Q000150:complications*; D012964:Sodium
chemical_list: D012964:Sodium