Ultraviolet RaysSkin NeoplasmsCarcinoma, Basal CellSkinSunscreening AgentsSunlightSunburnSkin PigmentationNeoplasms, Radiation-InducedSkin AgingSkin DiseasesUltraviolet TherapyCarcinoma, Squamous CellKeratosisMelanomaMice, HairlessPUVA TherapySunbathingSpectrophotometry, UltravioletEarly Detection of CancerGamma RaysErythemaDose-Response Relationship, RadiationKeratosis, ActinicRadiation EffectsBowen's DiseaseBeauty CulturePhotosensitivity DisordersProtective ClothingKeratinocytesSkin Physiological PhenomenaPyrimidine DimersEpidermis