title: Phototesting as an objective measure of improvement in erythropoietic protoporphyria.
mesh_terms: D002338:Carotenoids / Q000627:therapeutic use; D006801:Humans; D008027:Light; D010787:Photosensitivity Disorders / Q000175:diagnosis; D011164:Porphyrias / Q000175:diagnosis* / Q000628:therapy
chemical_list: D002338:Carotenoids