Vitamin A in the treatment of lichen planus pigmentosus.
D004305:Dose-Response Relationship, Drug; D006801:Humans; D008010:Lichen Planus / Q000188:drug therapy*; D010859:Pigmentation Disorders / Q000188:drug therapy*; D014801:Vitamin A / Q000097:blood / Q000627:therapeutic use*
D014801:Vitamin A