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.
Xiong Y, Brandley MC, Xu S, Zhou K, Yang G.Xiong Y, et al. Among authors: xu s.BMC Evol Biol. 2009 Jan 25;9:20. doi: 10.1186/1471-2148-9-20.BMC Evol Biol. 2009.PMID: 19166626Free PMC article.
Shen T, Xu S, Yang M, Pang S, Yang G.Shen T, et al. Among authors: xu s.Vet Immunol Immunopathol. 2011 May 15;141(1-2):33-45. doi: 10.1016/j.vetimm.2011.02.002. Epub 2011 Feb 12.Vet Immunol Immunopathol. 2011.PMID: 21377740