Oropharyngeal NeoplasmsOropharynxPharyngeal DiseasesRadiation DosageRadiation, IonizingCandidiasis, OralRadiation InjuriesDose-Response Relationship, RadiationDeglutition DisordersRadiation ToleranceRadiationRadiation ProtectionRadiation MonitoringDeglutitionCarcinoma, Squamous CellMouth NeoplasmsMouthNeoplasmsPharynxRadiation OncologyNeoplasms, Radiation-InducedPancreatic NeoplasmsPapillomavirus InfectionsTonsillar NeoplasmsHuman papillomavirus 16Head and Neck NeoplasmsRadiotherapyCosmic RadiationRadiation Injuries, ExperimentalFluconazoleNeoplasms, Second PrimaryRadiotherapy DosageTongueCombined Modality TherapyRadiation PneumonitisNeoplasms, Cystic, Mucinous, and SerousGamma RaysRadiotherapy, Intensity-ModulatedNeoplasm StagingBackground RadiationTongue NeoplasmsPharyngeal NeoplasmsSkin NeoplasmsRespiratory AspirationPharyngeal MusclesOtorhinolaryngologic Surgical ProceduresMouth MucosaRadiometryGlossectomyCandida albicansUltraviolet RaysAntifungal AgentsFluoroscopyLaryngeal MasksRadiation EffectsTreatment OutcomeHypopharyngeal NeoplasmsNeoplasms, Multiple PrimaryRetrospective StudiesHyoid BoneImmunohistochemistryNeoplasm Recurrence, LocalUvulaPapillomaviridaeTomography, X-Ray ComputedPneumonia, AspirationRadiation-Sensitizing AgentsEsophageal DiseasesPharyngitisChemoradiotherapyTime FactorsCandidaRadiation-Protective AgentsKidney NeoplasmsDose FractionationBodily SecretionsAlphapapillomavirusPrognosisThyroid NeoplasmsLarynxCyclin-Dependent Kinase Inhibitor p16Lip NeoplasmsAIDS-Related Opportunistic InfectionsDecontaminationCarrier StateTumor Markers, BiologicalRadiotherapy, AdjuvantCandidiasisAcute Radiation SyndromePalate, SoftLaryngeal NeoplasmsNeoplasm ProteinsPharyngectomyAdenocarcinoma, MucinousDNA, NeoplasmNasopharynxRadiotherapy Planning, Computer-AssistedCobalt RadioisotopesMyeloproliferative DisordersOrgans at Risk