Confounding by indication and channeling over time: the risks of beta 2-agonists. [electronic resource]
Producer: 19970107Description: 1161-9 p. digitalISSN:- 0002-9262
- Administration, Inhalation
- Adolescent
- Adrenergic beta-Agonists -- adverse effects
- Adult
- Albuterol -- adverse effects
- Asthma -- drug therapy
- Child
- Cohort Studies
- Confounding Factors, Epidemiologic
- Epidemiologic Methods
- Fenoterol -- adverse effects
- Humans
- Longitudinal Studies
- Middle Aged
- Risk Factors
- Severity of Illness Index
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Publication Type: Journal Article; Research Support, Non-U.S. Gov't
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