Mouth MucosaSkinEpitheliumMouthIntestinal MucosaGastric MucosaSkin AgingSkin NeoplasmsSkin DiseasesSkin Physiological PhenomenaNasal MucosaEpidermisSkin AbsorptionEpithelium, CornealKeratinocytesSkin PigmentationFibroblastsOlfactory MucosaEpithelial CellsSkin, ArtificialUltraviolet RaysDermisMouth FloorSkin TestsCells, CulturedMucous MembraneSeminiferous EpitheliumImmunohistochemistryMouth DiseasesRetinal Pigment EpitheliumErythemaMouth NeoplasmsColonRespiratory MucosaRNA, MessengerWound HealingOrgan Culture TechniquesAdministration, TopicalTime FactorsSkin TransplantationKeratinsBiopsyLaryngeal MucosaMicroscopy, ElectronMelanocytesEsophagusSunlightMouthwashesMetaplasiaMelaninsReverse Transcriptase Polymerase Chain ReactionSebaceous GlandsDermatitisCell DifferentiationMouth, EdentulousTracheaTongueAdministration, CutaneousSkin Physiological ProcessesIntestine, SmallLangerhans CellsGene ExpressionIn Situ HybridizationSkin UlcerBronchiPrecancerous ConditionsBlisterSweat GlandsMolecular Sequence DataDuodenumMicroscopy, Electron, ScanningXerostomiaSkin Diseases, BacterialCollagenHair FollicleMice, HairlessCorneaSunscreening AgentsCell DivisionMice, Inbred C57BLCell LineCarcinoma, Basal CellEnterovirus A, HumanModels, BiologicalCarcinoma, Squamous CellKeratosisSignal TransductionMouth ProtectorsPermeabilityHistocytochemistryGene Expression RegulationImmunoenzyme TechniquesCheekPsoriasisRabbitsMice, TransgenicInjections, IntradermalFluorescent Antibody TechniqueBlotting, WesternIleum