title: Two cases of intestinal obstruction with acquired group B antigen.
mesh_terms: D000328:Adult; D000372:Agglutination Tests; D000941:Antigens; D003298:Coombs Test; D004912:Erythrocytes / Q000276:immunology; D006801:Humans; D007106:Immune Sera / Q000032:analysis; D007415:Intestinal Obstruction / Q000276:immunology*; D008297:Male
chemical_list: D000941:Antigens; D007106:Immune Sera