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COPD in Chinese nonsmokers
Y. Zhou, C. Wang, W. Yao, P. Chen, J. Kang, S. Huang, B. Chen, C. Wang, D. Ni, X. Wang, D. Wang, S. Liu, J. Lu, J. Zheng, N. Zhong, P. Ran
European Respiratory Journal 33 (3) 509-518; DOI: 10.1183/09031936.00084408 Published 27 February 2009