title: Variation in theophylline clearance rate.
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000097:blood*; D002648:Child; D006801:Humans; D008657:Metabolic Clearance Rate; D013806:Theophylline / Q000008:administration & dosage / Q000097:blood*
chemical_list: D013806:Theophylline