title: Natural killer cell activity in mouse aggregation chimeras.
mesh_terms: D000375:Aging; D000818:Animals; D002678:Chimera; D003602:Cytotoxicity, Immunologic; D005260:Female; D007694:Killer Cells, Natural / Q000276:immunology*; D008285:Major Histocompatibility Complex; D051379:Mice; D008805:Mice, Inbred A; D008810:Mice, Inbred C57BL; D013154:Spleen / Q000276:immunology