title: Natural killer cell activity in germfree and conventional rats.
mesh_terms: D000818:Animals; D002460:Cell Line; D003602:Cytotoxicity, Immunologic; D005856:Germ-Free Life; D007694:Killer Cells, Natural / Q000276:immunology*; D008223:Lymphoma; D051379:Mice; D051381:Rats; D011919:Rats, Inbred Strains