Skin AbsorptionTetrachloroethyleneTolueneAtmosphere Exposure ChambersAbsorptionBenzeneIntestinal AbsorptionMethanolSolventsSkinSkin DiseasesSkin AgingSkin NeoplasmsSkin Physiological PhenomenaBiological AvailabilitySkin TestsTissue and Organ ProcurementOrgan TransplantationSkin PigmentationSpectrophotometry, Atomic