title: Natural killer (NK) activity in children with acute lymphoblastic leukemia.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003602:Cytotoxicity, Immunologic; D006801:Humans; D007223:Infant; D007694:Killer Cells, Natural / Q000276:immunology*; D007945:Leukemia, Lymphoid / Q000188:drug therapy / Q000276:immunology*