title: Ileal predilection of graft-versus-host disease.
mesh_terms: D006086:Graft vs Host Disease / Q000150:complications* / Q000276:immunology; D006684:HLA-DR Antigens / Q000276:immunology; D006801:Humans; D007077:Ileal Diseases / Q000209:etiology* / Q000276:immunology; D010581:Peyer's Patches / Q000276:immunology
chemical_list: D006684:HLA-DR Antigens