Graft vs Host Disease/immunology; Acute Disease; Animals; Antibodies, Monoclonal/administration & dosage; Antibodies, Monoclonal/therapeutic use; Antigen Presentation; Antineoplastic Agents/adverse effects; Bone Marrow/drug effects; Bone Marrow/immunology; Bone Marrow/pathology; Bone Marrow/radiation effects; Digestive System/drug effects; Digestive System/immunology; Digestive System/pathology; Digestive System/radiation effects; Dogs; Drug Design; Drug Therapy, Combination; Forecasting; Graft vs Host Disease/etiology; Graft vs Host Disease/genetics; Graft vs Host Disease/pathology; Graft vs Host Disease/prevention & control; Graft vs Host Disease/therapy; HLA Antigens/immunology; Hematopoietic Stem Cell Transplantation/adverse effects; Humans; Immunosuppressive Agents/administration & dosage; Immunosuppressive Agents/therapeutic use; Liver/drug effects; Liver/immunology; Liver/pathology; Liver/radiation effects; Lymphocyte Depletion; Lymphokines/physiology; Mice; Models, Biological; Premedication; Radiation Chimera; Radiation Injuries/immunology; Radiation Injuries/pathology; Randomized Controlled Trials as Topic; Receptors, Interleukin-2/antagonists & inhibitors; Risk Factors; Severity of Illness Index; Skin/drug effects; Skin/immunology; Skin/pathology; Skin/radiation effects; T-Lymphocytes, Cytotoxic/immunology; T-Lymphocytes, Cytotoxic/transplantation