title: Theophylline levels in COPD exacerbations.
authors.forename: M S
authors.initials: MS
authors.lastname: Nelson
mesh_terms: D000208:Acute Disease; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000097:blood / Q000188:drug therapy*; D013806:Theophylline / Q000097:blood / Q000627:therapeutic use*
chemical_list: D013806:Theophylline