title: Controlled trials of PUVA and etretinate for psoriasis.
mesh_terms: D002986:Clinical Trials as Topic; D004359:Drug Therapy, Combination; D005050:Etretinate / Q000627:therapeutic use*; D006801:Humans; D011701:PUVA Therapy; D010778:Photochemotherapy; D011565:Psoriasis / Q000188:drug therapy*
chemical_list: D005050:Etretinate