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Chinese
Prevalence Rate and Risk Factors of Chronic Obstructive Pulmonary Disease in Xicheng District of Beijing
CHEN Xue, LI Dong-xia, DING Jing
Chinese General Practice . 2016, (
36
): 4461 -4467 . DOI: 10.3969/j.issn.1007-9572.2016.36.012
