Hong Y, Lim MN, Kim WJ, Rhee CK, Yoo KH, Lee JH, Yoon HI, Kim TH, Lee JH, Lim SY, Lee SD, Oh YM
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is characterized by airflow limitation and results from environmental factors and genetic factors. Although cigarette smoking is a major risk factor, other environmental exposures...