title: Psoralens and ultraviolet A, immunosuppression, and porokeratosis.
mesh_terms: D000818:Animals; D006168:Guinea Pigs; D006801:Humans; D007108:Immune Tolerance; D007111:Immunity, Cellular; D007642:Keratosis / Q000209:etiology*; D051379:Mice; D011701:PUVA Therapy / Q000009:adverse effects*