title: [The relationship between plasma theophylline levels and respiratory impedance in asthmatic patients].
mesh_terms: D001249:Asthma / Q000097:blood* / Q000188:drug therapy / Q000503:physiopathology; D006801:Humans; D012119:Respiration; D013806:Theophylline / Q000008:administration & dosage / Q000097:blood*
chemical_list: D013806:Theophylline