title: An improved spectrophotometric assay of urinary metanephrines.
mesh_terms: D000310:Adrenal Gland Neoplasms / Q000652:urine; D000959:Antihypertensive Agents / Q000652:urine; D004837:Epinephrine / Q000031:analogs & derivatives*; D006801:Humans; D008676:Metanephrine / Q000652:urine*; D010673:Pheochromocytoma / Q000652:urine; D013053:Spectrophotometry; D013752:Tetracycline / Q000652:urine
chemical_list: D000959:Antihypertensive Agents; D008676:Metanephrine; D013752:Tetracycline; D004837:Epinephrine