title: Improved screening tests for porphyrin.
mesh_terms: D002855:Chromatography, Thin Layer; D005453:Fluorescence; D006801:Humans; D008722:Methods; D011164:Porphyrias / Q000175:diagnosis*; D011166:Porphyrins / Q000652:urine*
chemical_list: D011166:Porphyrins