Dose-Response Relationship, RadiationRadiotherapy, AdjuvantUltraviolet RaysCombined Modality TherapyChemoradiotherapyChemoradiotherapy, AdjuvantChemotherapy, AdjuvantNuclear EnergyRadiation DosagePancreaticoduodenectomyRadiation MonitoringNeoplasmsRadiation InjuriesNuclear ReactorsAdenocarcinomaFluorouracilNeoplasms, Radiation-InducedRectal NeoplasmsRadiotherapy DosagePancreatic NeoplasmsNeoadjuvant TherapyRadiotherapyTreatment OutcomeBrachytherapyNuclear WarfareAmpulla of VaterRadiation, IonizingCommon Bile Duct NeoplasmsCarcinogensRadioactive FalloutAir Pollution, RadioactiveKazakhstanHead and Neck NeoplasmsCarcinoma, Squamous CellRadiometryCisplatinRadiation ToleranceAntineoplastic Combined Chemotherapy ProtocolsNeoplasm StagingEsophageal NeoplasmsNeoplasm Recurrence, LocalAneuploidyRadiotherapy, ConformalRadiationSurvival AnalysisDose FractionationCell Transformation, NeoplasticRadiotherapy, Intensity-ModulatedDisease-Free SurvivalRetrospective StudiesAdjuvants, ImmunologicRadioisotopesAntineoplastic AgentsSurvival RateRadiation OncologyPrognosisRadiation ProtectionAnus NeoplasmsFollow-Up StudiesDeoxycytidineRisk AssessmentRadiotherapy Planning, Computer-AssistedRadiation-Sensitizing AgentsTomography, X-Ray ComputedRisk FactorsPositron-Emission TomographyRadiation PneumonitisThyroid NeoplasmsOccupational ExposureBreast NeoplasmsProspective StudiesLymphatic MetastasisEsophagectomyRadiation Injuries, ExperimentalBrain NeoplasmsRadiosurgeryLung NeoplasmsRadiodermatitisRadiotherapy, High-EnergyFreund's AdjuvantProstatic NeoplasmsGamma RaysRadiotherapy, Image-GuidedRemission InductionCosmic RadiationUterine Cervical NeoplasmsOropharyngeal NeoplasmsRadiotherapy, Computer-AssistedAntimetabolites, AntineoplasticCranial IrradiationTime FactorsPreoperative CareCobalt RadioisotopesCarcinoma, Non-Small-Cell LungParticle AcceleratorsKaplan-Meier EstimateNeoplasm MetastasisTumor BurdenCarcinomaRadiation-Protective Agents