title: Caffeine concentrations in adult patients chronically taking theophylline.
authors.forename: J
authors.initials: J
authors.lastname: Soto
authors.forename: J A
authors.initials: JA
authors.lastname: Sacristan
authors.forename: M J
authors.initials: MJ
authors.lastname: Alsar
mesh_terms: D000328:Adult; D000368:Aged; D002110:Caffeine / Q000097:blood*; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000097:blood / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D013806:Theophylline / Q000493:pharmacokinetics* / Q000627:therapeutic use
chemical_list: D002110:Caffeine; D013806:Theophylline