Rats, Inbred F344Appetite StimulantsFANFTRats, Inbred LewAspergillus ochraceusCalcium CitrateLeydig Cell TumorRodent DiseasesChlordiazepoxideNeoplasms, ExperimentalSpecies Specificity2-AcetylaminofluoreneCarcinogensThyroid GlandLiver Neoplasms, ExperimentalRats, Inbred StrainsNitrosaminesAgingAflatoxin B1LiverOrgan SizeBody WeightTime FactorsPrecancerous ConditionsHyperplasiaGliomaNeoplasm TransplantationDose-Response Relationship, DrugF FactorCorticosteroneCell LineF2-IsoprostanesUrinary Bladder NeoplasmsDietMammary Neoplasms, ExperimentalCell Transformation, ViralRats, Inbred BNDisease Models, AnimalSpleenBrain NeoplasmsKidneyEpitheliumAnimals, NewbornCell DivisionProstaglandins FCells, CulturedFluorodeoxyglucose F18