title: HL-A antigens in aged persons.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D000939:Epitopes; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D006801:Humans; D008875:Middle Aged
chemical_list: D000939:Epitopes; D006680:HLA Antigens; D006649:Histocompatibility Antigens