title: Natural killer cells as antitumor effector cells.
mesh_terms: D000818:Animals; D003602:Cytotoxicity, Immunologic; D007113:Immunity, Innate; D007694:Killer Cells, Natural / Q000276:immunology*; D051379:Mice; D009374:Neoplasms, Experimental / Q000276:immunology*; D051381:Rats; D013601:T-Lymphocytes / Q000276:immunology