LeucovorinGlucuronatesFluorouracilOrganoplatinum CompoundsAntineoplastic Combined Chemotherapy ProtocolsAntidotesColorectal NeoplasmsCamptothecinTrimetrexateDrug Administration ScheduleUracilMethotrexateTegafurInfusions, IntravenousAntimetabolites, AntineoplasticTetrahydrofolatesLevamisoleAdenocarcinomaLevoleucovorinSurvival AnalysisAminopterinChronotherapyNeoplasm MetastasisTreatment OutcomeColonic NeoplasmsDisease-Free SurvivalThymidylate SynthaseFloxuridineRectal NeoplasmsChemotherapy, AdjuvantStomatitisInjections, IntravenousFolic Acid AntagonistsAdministration, OralNeutropeniaInfusions, Intra-ArterialCisplatinDiarrheaPteroylpolyglutamic AcidsSurvival RateStomach NeoplasmsMaximum Tolerated DoseNeoplasm StagingCombined Modality TherapyPolyglutamic AcidDose-Response Relationship, DrugLeukemia L1210gamma-Glutamyl HydrolaseDeoxycytidineAntibodies, Monoclonal, HumanizedDrug EvaluationVitamin B ComplexNauseaFluorodeoxyuridylateLiver NeoplasmsHepatic ArteryDihydrouracil Dehydrogenase (NADP)LeukopeniaBiliary Tract NeoplasmsGastrointestinal NeoplasmsAgranulocytosisSalvage TherapyNeoplasm Recurrence, LocalDisease ProgressionNeoadjuvant TherapyThrombocytopeniaPhosphonoacetic AcidQuinazolines