title: Genetic markers and severity of duodenal ulcer.
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics; D004198:Disease Susceptibility; D004378:Duodenal Diseases / Q000209:etiology; D004381:Duodenal Ulcer / Q000150:complications / Q000235:genetics* / Q000473:pathology; D005744:Gastric Acid / Q000378:metabolism; D006396:Hematemesis / Q000209:etiology; D006801:Humans; D007416:Intestinal Perforation / Q000209:etiology; D008551:Melena / Q000209:etiology; D010435:Pepsinogens / Q000097:blood / Q000378:metabolism; D010438:Peptic Ulcer Hemorrhage / Q000209:etiology; D010439:Peptic Ulcer Perforation / Q000209:etiology; D012907:Smoking; D013276:Stomach Ulcer / Q000235:genetics
chemical_list: D000017:ABO Blood-Group System; D010435:Pepsinogens