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Changing patterns in the prevalence of asthma and associated morbidity and mortality are of growing public concern. There are both national and international efforts to find ways to reduce the impact of this disease. Yet, for all the concern, much about the underlying pathophysiology of asthma, the interdependency between host and environment, and the natural history of the disorder remains a mystery. These major gaps in our knowledge about asthma provide a clear opportunity for contributions from the field of epidemiology.
Although knowledge of the clinical syndrome of asthma has been documented for over 2000 years, much of the epidemiologic
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