Adoptive Transfer/methods; Antineoplastic Agents/therapeutic use; Diphtheria Toxin/therapeutic use; Interleukin-2/therapeutic use; Killer Cells, Natural/transplantation; Lung Neoplasms/immunology; Lymphocyte Depletion/methods; T-Lymphocytes, Regulatory/immunology; Adaptive Immunity; Animals; Antineoplastic Agents/administration & dosage; Cell Proliferation/drug effects; Cells, Cultured; Colonic Neoplasms/drug therapy; Colonic Neoplasms/immunology; Colonic Neoplasms/secondary; Diphtheria Toxin/administration & dosage; Hydrocortisone/administration & dosage; Hydrocortisone/therapeutic use; Interleukin-15/administration & dosage; Interleukin-2/administration & dosage; Killer Cells, Natural/cytology; Killer Cells, Natural/immunology; Lung Neoplasms/drug therapy; Lung Neoplasms/pathology; Lymphocyte Activation/drug effects; Lymphocyte Activation/immunology; Mice; Mice, Inbred BALB C; Random Allocation; Recombinant Fusion Proteins/administration & dosage; Recombinant Fusion Proteins/therapeutic use; T-Lymphocytes, Regulatory/drug effects; T-Lymphocytes, Regulatory/pathology