title: The Allen correction for porphyrin estimation in spectrofluorimetry.
mesh_terms: D005243:Feces / Q000032:analysis; D006801:Humans; D011166:Porphyrins / Q000032:analysis / Q000097:blood* / Q000652:urine; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D011166:Porphyrins