Determination of caffeine in serum and urine.
D001554:Benzene; D002110:Caffeine / Q000097:blood* / Q000652:urine*; D007202:Indicators and Reagents; D008722:Methods; D013057:Spectrum Analysis; D013805:Theobromine / Q000097:blood / Q000652:urine; D013806:Theophylline / Q000097:blood / Q000652:urine
D007202:Indicators and Reagents; D002110:Caffeine; D013806:Theophylline; D001554:Benzene; D013805:Theobromine