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Pulmonary Disease, Chronic Obstructive
Pulmonary Emphysemas
Dyspnea
Forced Expiratory Volume
Total Lung Capacity
Vital Capacity
Airway Resistance
Sex Factors
Risk Factors
Prospective Studies
Comorbidity
Cohort Studies
Respiratory Function Tests
Spirometry
X Ray Computed Tomography
Sickness Impact Profile
Spain
Smoking
Questionnaires
Disease Progression
Co-Publications
15
14
11
6
5
4
3
2
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