title: Respiratory muscle failure: fatigue or weakness? The role of theophylline.
mesh_terms: D006801:Humans; D009119:Muscle Contraction / Q000187:drug effects; D009135:Muscular Diseases / Q000188:drug therapy* / Q000503:physiopathology; D013806:Theophylline / Q000627:therapeutic use*
chemical_list: D013806:Theophylline