Prevalence and risk factors for COPD in greenhouse farmers: a large, cross-sectional survey of 5,880 farmers from northeast China
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Shuyue Xia | Zhenhua Li | Yu Chen | De-liang Wen | Yangang Ren | Shuo Liu | Xiao-ge Wang | Li-yun Li | Yibing Zhang | Donghong Chen | Shuang Fu | Hong Chen | Jian Zhao | Xuhua Zhang | Dongliang Wang