Buist AS et al. - BOLD has estimated the social and economic burden of COPD in 12 countries to date. BOLD and the Proyecto Latinoamericano de Investigación en Obstrucción Pulmonar (the PLATINO study) are developing a growing database of COPD prevalence. Cigarette smoking and age are the most important COPD risk factors, but other risk factors should also be explored.
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