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1471-2458-11-586
1471-2458-11-586
http://dx.doi.org/10.1186/1471-2458-11-586
Prevalence of COPD and its association with socioeconomic status in China: findings from China Chronic Disease Risk Factor Surveillance 2007.
P356
Q33968963-79DFBA97-4227-4E44-B712-56022B8681EA
P356
1471-2458-11-586
http://dx.doi.org/10.1186/1471-2458-11-586