title: Letter: Self and not-self.
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D000917:Antibody Formation; D000941:Antigens; D001324:Autoantigens; D001327:Autoimmune Diseases; D001666:Binding Sites, Antibody; D002477:Cells / Q000276:immunology*; D004906:Erythrocyte Count; D006801:Humans; D007104:Immune Adherence Reaction; D007958:Leukocyte Count; D008221:Lymphoid Tissue / Q000276:immunology; D051379:Mice; D008808:Mice, Inbred CBA; D008814:Mice, Inbred NZB; D008875:Middle Aged; D013154:Spleen / Q000276:immunology; D013934:Thymectomy; D013950:Thymus Gland / Q000276:immunology
chemical_list: D000941:Antigens; D001324:Autoantigens