title: Circadian rhythm in activity of lympholytic natural killer cells from spleens of Fischer rats.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D003602:Cytotoxicity, Immunologic; D007694:Killer Cells, Natural / Q000276:immunology*; D008297:Male; D009369:Neoplasms / Q000188:drug therapy; D051381:Rats; D011919:Rats, Inbred Strains; D013154:Spleen / Q000276:immunology; D013997:Time Factors