DISABILITY IN PATIENTS WITH  OBSTRUCTIVE PULMONARY DISEASE.
D001784:Blood Gas Analysis; D004185:Disability Evaluation; D004417:Dyspnea; D006801:Humans; D008171:Lung Diseases; D008173:Lung Diseases, Obstructive; D005082:Physical Exertion; D013147:Spirometry
BLOOD GAS ANALYSIS; DISABILITY EVALUATION; DYSPNEA; EXERTION; LUNG DISEASES; SPIROMETRY