13-Cis-retinoic acid in severe acne.
D000152:Acne Vulgaris / Q000188:drug therapy*; D006801:Humans; D012629:Sebum / Q000378:metabolism; D012867:Skin / Q000187:drug effects; D014212:Tretinoin / Q000494:pharmacology / Q000627:therapeutic use*; D014801:Vitamin A / Q000031:analogs & derivatives*
D014801:Vitamin A; D014212:Tretinoin