Instructions: Epidemiology paper on Chronic obstructive pulmonary disease (COPD)

Instructions: Epidemiology paper on Chronic obstructive pulmonary disease (COPD), answer all the questions completely
The literature selected should include primary sources (written as original research or as a paper). Half (5) of the references must come from peer-reviewed journals and the rest may come from books and acceptable web sources (Center for Disease Prevention and Control [CDC], Morbidity and Mortality Weekly Reports [MMWR], National Institute of Health [NIH] e.g.).