title: HLA and peptic ulcer.
mesh_terms: D004381:Duodenal Ulcer / Q000276:immunology; D005260:Female; D005838:Genotype; D006680:HLA Antigens / Q000235:genetics / Q000276:immunology*; D006801:Humans; D008297:Male; D010437:Peptic Ulcer / Q000276:immunology*
chemical_list: D006680:HLA Antigens