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.
Liu F, Kong X, Cao J, Chen S, Li C, Huang J, Gu D, Kelly TN.Liu F, et al. Among authors: gu d.Am J Epidemiol. 2015 Mar 1;181(5):337-48. doi: 10.1093/aje/kwu260. Epub 2015 Feb 10.Am J Epidemiol. 2015.PMID: 25673817Free PMC article.
Zhao Q, Fan Z, He J, Chen S, Li H, Zhang P, Wang L, Hu D, Huang J, Qiang B, Gu D.Zhao Q, et al. Among authors: gu d.J Mol Med (Berl). 2007 Aug;85(8):877-85. doi: 10.1007/s00109-006-0151-4. Epub 2007 Jan 10.J Mol Med (Berl). 2007.PMID: 17216203