title: Caffeine withdrawal elevates urinary MHPG excretion.
mesh_terms: D002110:Caffeine; D006801:Humans; D008734:Methoxyhydroxyphenylglycol / Q000652:urine; D013375:Substance Withdrawal Syndrome / Q000652:urine*
chemical_list: D002110:Caffeine; D008734:Methoxyhydroxyphenylglycol