title: Letter: Retinoic acid in acne therapy.
mesh_terms: D000152:Acne Vulgaris / Q000188:drug therapy*; D005260:Female; D005333:Fetus / Q000187:drug effects*; D006801:Humans; D011247:Pregnancy; D014212:Tretinoin / Q000009:adverse effects* / Q000627:therapeutic use; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D014801:Vitamin A; D014212:Tretinoin