title: Gas chromatographic analysis of theophylline in human serum.
mesh_terms: D002110:Caffeine / Q000097:blood; D002849:Chromatography, Gas; D004809:Ephedrine / Q000097:blood; D005069:Evaluation Studies as Topic; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D008433:Mathematics; D008722:Methods; D008832:Microchemistry; D013806:Theophylline / Q000097:blood* / Q000652:urine; D013997:Time Factors
chemical_list: D002110:Caffeine; D013806:Theophylline; D004809:Ephedrine; D006854:Hydrocortisone