Radioactive Hazard ReleaseChemical Hazard ReleaseRadiation DosageRadiation, IonizingRadiation InjuriesDose-Response Relationship, RadiationRadiation ToleranceRadiationRadiation ProtectionRadiation MonitoringRadiation OncologyProportional Hazards ModelsCosmic RadiationRadiation Injuries, ExperimentalRadiation PneumonitisNeoplasms, Radiation-InducedGamma RaysBackground RadiationRadiotherapyRadiometryRadiotherapy DosageUltraviolet RaysRadiation EffectsCombined Modality TherapyRadiation-Sensitizing AgentsRadiation-Protective AgentsTime Factors