Chronic obstructive pulmonary disease: some thoughts on the current state of our knowledge.
D001945:Breathing Exercises; D001993:Bronchodilator Agents / Q000627:therapeutic use; D002908:Chronic Disease; D005500:Follow-Up Studies; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis / Q000188:drug therapy / Q000401:mortality / Q000628:therapy; D013147:Spirometry; D013997:Time Factors
D001993:Bronchodilator Agents