Prevalence and risk factors for COPD in greenhouse farmers: a large, cross-sectional survey of 5,880 farmers from northeast China

by Liu S, Ren YG, Wen DL, Chen Y, Chen DH, Li LY, Zhang XH, Zhang YB, Fu S, Li ZH, Xia SY, Wang DL, Chen H, Zhao J, Wang XG
Published 2015-10-01