title: Letter: K cells in leukaemia.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007945:Leukemia, Lymphoid / Q000097:blood* / Q000628:therapy; D007958:Leukocyte Count; D008214:Lymphocytes / Q000473:pathology*; D012075:Remission, Spontaneous