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Brazil
Socioeconomic Factors
Cohort Studies
Prevalence
Risk Factors
Cross-Sectional Studies
Urban Population
Sex Factors
Educational Status
Smoking
Questionnaires
Newborn Infant
Infants
Pulmonary Disease, Chronic Obstructive
Body Mass Index
Obesity
Respiratory Sounds
Epidemiologic Methods
Spirometry
Birth Weight
Co-Publications
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