title: Vitamin E in porphyria.
mesh_terms: D005243:Feces / Q000032:analysis; D006801:Humans; D011164:Porphyrias / Q000652:urine*; D011166:Porphyrins / Q000032:analysis / Q000652:urine*; D014810:Vitamin E / Q000494:pharmacology*
chemical_list: D011166:Porphyrins; D014810:Vitamin E