Chemoradiotherapy, AdjuvantRadiotherapy, AdjuvantChemoradiotherapyChemotherapy, AdjuvantGastrectomyCombined Modality TherapyFluorouracilAdjuvants, ImmunologicTreatment OutcomeAdenocarcinomaRetrospective StudiesFreund's AdjuvantAntineoplastic Combined Chemotherapy ProtocolsNeoadjuvant TherapyEsophageal NeoplasmsCisplatinRectal NeoplasmsNeoplasm StagingCarcinoma, Squamous CellRadiotherapy DosageDisease-Free SurvivalHead and Neck NeoplasmsEsophagectomySurvival AnalysisAdjuvants, PharmaceuticSurvival RateNeoplasm Recurrence, LocalRadiotherapyPrognosisAntineoplastic AgentsDose FractionationAntimetabolites, AntineoplasticDeoxycytidineKaplan-Meier EstimateNasopharyngeal NeoplasmsDrug Administration ScheduleFollow-Up StudiesInduction ChemotherapyLung NeoplasmsHypopharyngeal NeoplasmsOrgan Sparing TreatmentsCarboplatinBreast Neoplasms