Name: American Thoracic Society
 Description: EpidemiologyRisk Factors and Natural History. Epidemiology. Prevalence. Estimates of the prevalence of COPD depend on the definition and criteria used.
Category: Prevalence Epidemiology
Url: http://www.thoracic.org/COPD/2/epidemiology_prevalence.asp
Date: Oct 7, 2005
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