An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Xu X, Yang J, Chen C, Wang B, Jin Y, Fang Z, Wang X, Weiss ST.Xu X, et al. Among authors: chen c.Am J Respir Crit Care Med. 1999 Dec;160(6):1928-33. doi: 10.1164/ajrccm.160.6.9902013.Am J Respir Crit Care Med. 1999.PMID: 10588608
Xu X, Niu T, Chen C, Wang B, Jin Y, Yang J, Weiss ST.Xu X, et al. Among authors: chen c.Chest. 2001 Mar;119(3):691-700. doi: 10.1378/chest.119.3.691.Chest. 2001.PMID: 11243944
Venners SA, Wang X, Chen C, Wang B, Ni J, Jin Y, Yang J, Fang Z, Weiss ST, Xu X.Venners SA, et al. Among authors: chen c.Am J Respir Crit Care Med. 2001 Sep 15;164(6):973-6. doi: 10.1164/ajrccm.164.6.2009063.Am J Respir Crit Care Med. 2001.PMID: 11587981
Hu FB, Wang B, Chen C, Jin Y, Yang J, Stampfer MJ, Xu X.Hu FB, et al. Among authors: chen c.Am J Epidemiol. 2000 Jan 1;151(1):88-97. doi: 10.1093/oxfordjournals.aje.a010127.Am J Epidemiol. 2000.PMID: 10625178
Chen C, Cho SI, Damokosh AI, Chen D, Li G, Wang X, Xu X.Chen C, et al. Among authors: chen d.Environ Health Perspect. 2000 Nov;108(11):1019-22. doi: 10.1289/ehp.001081019.Environ Health Perspect. 2000.PMID: 11102290Free PMC article.