[Experimental studies and clinical investigations on natural killer (NK) activity--NK activity in tumor bearing nude mice and in patients with cancer of digestive organs].
D000818:Animals; D003602:Cytotoxicity, Immunologic; D004067:Digestive System Neoplasms / Q000276:immunology*; D005260:Female; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology*; D008297:Male; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D009374:Neoplasms, Experimental / Q000276:immunology*