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Asthma
Sleep Apnea Syndromes
Hemoptysis
Pulmonary Disease, Chronic Obstructive
Anemia
Metaproterenol
Aminophylline
Nicotine
Aerosols
Epinephrine
Smoking Cessation
Smoking
Respiration
Peak Expiratory Flow Rate
New York City
Respiratory Function Tests
Double-Blind Method
X Ray Computed Tomography
Cohort Studies
Age Factors
Co-Publications
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