Ultraviolet RaysSunlightSunscreening AgentsSunburnRadiation EffectsDose-Response Relationship, RadiationErythemaRadiation DosageSkin PigmentationNeoplasms, Radiation-InducedUltraviolet TherapyRadiation InjuriesSkinSkin NeoplasmsPUVA TherapyRadiation, IonizingRadiation TolerancePyrimidine DimersMice, HairlessIncandescenceMelanocytesRadiation Injuries, ExperimentalRadiationRadiation GeneticsMethoxsalenSunbathingDNA DamageAcetoxyacetylaminofluoreneMelaninsUrocanic AcidPhotosensitivity DisordersDNA RepairRadiation ProtectionRadiation MonitoringSkin AgingCarcinoma, Basal CellKeratinocytesProtective ClothingDermatitis, PhotoallergicSun Protection FactorMelanomaDermatitis, ContactSpectrophotometry, UltravioletHair ColorEye Protective DevicesFilm DosimetryCiliophoraReceptor, Melanocortin, Type 1Receptors, MelanocortinEnvironmental ExposureXeroderma PigmentosumOzoneEpidermisAnthralinRadiation OncologyMutationReceptors, CorticotropinCataractCosmic RadiationPterygiumKeratosisLens, CrystallineTime FactorsCell SurvivalGamma RaysAir MicrobiologySeasonsRadiation PneumonitisPhotochemistrySkin Physiological PhenomenaEyeThymineDeoxyribodipyrimidine Photo-LyaseMicrococcusArsenitesMice, Inbred C3HPsoriasisalpha-MSHMelanosomesVitamin DBackground RadiationDNACells, CulturedPhotolysisRadiotherapyAdministration, TopicalTumor Suppressor Protein p53LightMicroscopy, UltravioletImmunosuppressionRadiometryCell LineScattering, RadiationApoptosisHypersensitivity, DelayedRadiation-Protective AgentsFibroblastsRadiotherapy DosagePigmentationCarcinoma, Squamous Cell