Graft vs Host ReactionJejunal DiseasesSpleenIntestinal DiseasesMice, Inbred StrainsLymphocyte TransfusionRats, Inbred BNMice, Inbred CBAGraft vs Host DiseaseMice, Inbred DBATransplantation, HomologousT-LymphocytesLymphocyte Culture Test, MixedHypersensitivity, DelayedCytotoxicity, ImmunologicRats, Inbred LewBone Marrow TransplantationIntestinal MucosaMice, Inbred C57BLLymphocytesMice, Inbred BALB C