COPD patients: take a deep breath.
D005260:Female; D006801:Humans; D008297:Male; D036501:Metered Dose Inhalers; D011208:Powders / Q000008:administration & dosage*; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy* / Q000503:physiopathology
D011208:Powders