title: Letter: HL-A and disease.
mesh_terms: D000483:Alleles; D003093:Colitis, Ulcerative / Q000235:genetics / Q000276:immunology*; D003424:Crohn Disease / Q000235:genetics / Q000276:immunology*; D005816:Genetic Complementation Test; D006649:Histocompatibility Antigens / Q000032:analysis*; D006650:Histocompatibility Testing; D006801:Humans
chemical_list: D006649:Histocompatibility Antigens