<style face="normal" font="default" size="100%">Prevalence of chronic obstructive pulmonary disease (COPD) in China in 1990 and 2010.</style>

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0<style face="normal" font="default" size="100%">Prevalence of chronic obstructive pulmonary disease (COPD) in China in 1990 and 2010.</style><style face="normal" font="default" size="100%">Prevalence of chronic obstructive pulmonary disease (COPD) in China in 1990 and 2010.</style>