title: The combination of oral and topical psoralen with UVA.
mesh_terms: D000284:Administration, Oral; D000287:Administration, Topical; D011564:Furocoumarins / Q000008:administration & dosage*; D006801:Humans; D011701:PUVA Therapy; D010778:Photochemotherapy; D011565:Psoriasis / Q000188:drug therapy
chemical_list: D011564:Furocoumarins