title: HLA and duodenal ulcer in South African Indians.
mesh_terms: D004381:Duodenal Ulcer / Q000235:genetics / Q000276:immunology*; D005787:Gene Frequency; D006680:HLA Antigens / Q000235:genetics*; D006801:Humans; D007194:India / Q000208:ethnology; D013019:South Africa
chemical_list: D006680:HLA Antigens