title: A simple office procedure for the monitoring of theophylline levels in asthma.
mesh_terms: D001249:Asthma / Q000097:blood* / Q000188:drug therapy; D006801:Humans; D008722:Methods; D013056:Spectrophotometry, Ultraviolet; D013806:Theophylline / Q000097:blood* / Q000627:therapeutic use
chemical_list: D013806:Theophylline