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.
Mai XM, Chen Y, Camargo CA Jr, Langhammer A.Mai XM, et al. Among authors: chen y.Am J Epidemiol. 2012 May 15;175(10):1029-36. doi: 10.1093/aje/kwr456. Epub 2012 Feb 6.Am J Epidemiol. 2012.PMID: 22312120
Brumpton B, Langhammer A, Romundstad P, Chen Y, Mai XM.Brumpton B, et al. Among authors: chen y.Eur Respir J. 2013 Feb;41(2):323-9. doi: 10.1183/09031936.00012112. Epub 2012 May 31.Eur Respir J. 2013.PMID: 22653771Free article.
Mai XM, Langhammer A, Chen Y, Camargo CA Jr.Mai XM, et al. Among authors: chen y.Thorax. 2013 Jan;68(1):25-30. doi: 10.1136/thoraxjnl-2012-202061. Epub 2012 Sep 12.Thorax. 2013.PMID: 22977130
Mai XM, Langhammer A, Camargo CA Jr, Chen Y.Mai XM, et al. Among authors: chen y.Am J Epidemiol. 2012 Dec 15;176(12):1169-76. doi: 10.1093/aje/kws235. Epub 2012 Dec 2.Am J Epidemiol. 2012.PMID: 23204497
Brumpton BM, Camargo CA Jr, Romundstad PR, Langhammer A, Chen Y, Mai XM.Brumpton BM, et al. Among authors: chen y.Eur Respir J. 2013 Dec;42(6):1495-502. doi: 10.1183/09031936.00046013. Epub 2013 Jul 11.Eur Respir J. 2013.PMID: 23845717Free article.