title: Urinary excretion of  3 -methylxanthine and related compounds in children.
mesh_terms: D000293:Adolescent; D000328:Adult; D002099:Cacao; D002110:Caffeine / Q000378:metabolism; D002648:Child; D002675:Child, Preschool; D002852:Chromatography, Ion Exchange; D002854:Chromatography, Paper; D003069:Coffee; D004032:Diet; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000652:urine; D013058:Mass Spectrometry; D008745:Methylation; D009468:Neuromuscular Diseases / Q000652:urine; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism; D013662:Tea; D013805:Theobromine / Q000378:metabolism; D013806:Theophylline / Q000378:metabolism; D014970:Xanthines / Q000652:urine*
chemical_list: D003069:Coffee; D013662:Tea; D014970:Xanthines; D002110:Caffeine; D013806:Theophylline; D013805:Theobromine