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Emergency Service, Hospital
United States
Asthma
Acute Disease
Pulmonary Disease, Chronic Obstructive
Prospective Studies
Cohort Studies
Risk Factors
Logistic Models
Cross-Sectional Studies
Multivariate Analysis
Retrospective Studies
Severity of Illness Index
Hospitalization
Health Care Surveys
Anti-Asthmatic Agents
Vitamin D
Emergency Medicine
Young Adult
Questionnaires
Co-Publications
46
43
31
30
25
21
20
18
17
15
14
13
12
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