[Awareness of knowledge about chronic obstructive pulmonary disease and related factors in residents aged 40 years and older in China, 2014].

Jing Fan(Johns Hopkins University), B H Wang, Shu Cong(National Center for Chronic and Noncommunicable Disease Control and Prevention), N Wang, L H Wang, Heling Bao(Chinese Academy of Medical Sciences & Peking Union Medical College), Yunying Feng
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