AzoxymethaneColonic NeoplasmsCarcinogensRats, Inbred F344Aberrant Crypt FociColonAzo CompoundsPrecancerous ConditionsDextran SulfateIntestinal NeoplasmsAnticarcinogenic AgentsIntestinal MucosaTabebuiaCocarcinogenesisColitisMethylazoxymethanol AcetateCorn OilMonomethylhydrazinePiroxicamAdenomaDuodenal NeoplasmsCyclooxygenase 2Fish Oilsbeta CateninAdenocarcinomaNucleolus Organizer RegionDimethylhydrazinesCell Transformation, NeoplasticPhytic AcidCarcinogenesisRutinColorectal NeoplasmsOrnithine DecarboxylaseChemopreventionDietUrsodeoxycholic AcidBody Weight1,2-DimethylhydrazineSulindacDisease Models, AnimalNeoplasms, Experimental