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Denmark
Asthma
Diseases in Twins
Rhinitis
Hypersensitivity
Environmental Exposure
Bronchial Hyperreactivity
Risk Factors
Prevalence
Registries
Cross-Sectional Studies
Young Adult
Monozygotic Twins
Dizygotic Twins
Questionnaires
Smoking
Genetic Predisposition to Disease
Bronchial Provocation Tests
Skin Tests
Respiratory Function Tests
Co-Publications
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