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ORIGINAL ARTICLE
The risk factors for chronic obstructive pulmonary disease in Li and Han ethnic groups in Hainan, China Lin Li, Wu Duo-Yi, He Ping, Li Quan-Ni, Li Long-He, Chen Jian-Nan, Niu Huan, Ding Yi-Peng
Year : 2018 | Volume: 11 | Issue Number: 4 | Page: 305-308
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