Hemibody IrradiationWhole-Body IrradiationBone Marrow TransplantationTransplantation ConditioningTransplantation, HomologousRadiation Injuries, ExperimentalGraft vs Host DiseaseDose-Response Relationship, RadiationRadiation-Protective AgentsHematopoietic Stem Cell TransplantationTransplantation, AutologousBusulfanCyclophosphamideAcute Radiation SyndromeCombined Modality TherapyTransplantation ChimeraRadiation InjuriesRadiation DosageGamma Rays