Adenoma, Liver CellPulmonary Adenomatosis, OvineAdenomaLiver NeoplasmsBetaretrovirusAdenoma, BasophilAdenoma, OxyphilicPituitary NeoplasmsMultiple Endocrine NeoplasiaLiverParotid NeoplasmsIntestinal PolyposisDuodenal NeoplasmsLynestrenolLiver DiseasesAdenomatous Polyposis ColiAdenomatosis, PulmonaryIntestinal PolypsProlactinomaLymphocytes, NullLiver TransplantationLiver CirrhosisLiver RegenerationCarcinogenicity TestsPituitary HormonesMicrosomes, LiverRats, Inbred F344Thyroid NeoplasmsFatty LiverHepatocytesAdenoma, PleomorphicAdenoma, VillousMitochondria, LiverSheepDrug-Induced Liver InjuryLiver Neoplasms, ExperimentalImmunohistochemistry