PUVA TherapyPhotopheresisMethoxsalenPhotochemotherapyFicusinPsoralensAnthralinUltraviolet TherapyUltraviolet RaysExtracorporeal CirculationHematoporphyrinsPhototherapyPsoriasisPhotosensitizing AgentsLymphoma, T-Cell, CutaneousGraft vs Host DiseaseCross-Linking ReagentsSpectrophotometry, UltravioletPhotochemistryDermatitis, PhototoxicErythemaDNA RepairRadiation EffectsAmmiPsoraleaUmbelliferonesDose-Response Relationship, RadiationDNADNA DamageDNA AdductsMice, HairlessSunscreening AgentsCoumarinsSkin NeoplasmsNucleic Acid ConformationSkinPyrimidine DimersMicroscopy, UltravioletBlotting, SouthwesternBase SequenceSunlight