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Forced Expiratory Volume
Vital Capacity
Pulmonary Disease, Chronic Obstructive
Asthma
Systemic Scleroderma
Obstructive Lung Diseases
Pulmonary Emphysemas
Raynaud's Disease
Respiratory Function Tests
Double-Blind Method
Spirometry
Lung
Smoking
Risk Factors
Severity of Illness Index
Cohort Studies
Treatment Outcome
Quality of Life
Bronchodilator Agents
Pulmonary Diffusing Capacity
Co-Publications
40
20
19
17
16
15
13
11
10
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