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.
Lu D, Keck JL.Lu D, et al. Among authors: keck jl.Proc Natl Acad Sci U S A. 2008 Jul 8;105(27):9169-74. doi: 10.1073/pnas.0800741105. Epub 2008 Jun 30.Proc Natl Acad Sci U S A. 2008.PMID: 18591666Free PMC article.
Lu D, Bernstein DA, Satyshur KA, Keck JL.Lu D, et al. Among authors: keck jl.Proc Natl Acad Sci U S A. 2010 Jan 12;107(2):633-8. doi: 10.1073/pnas.0909191107. Epub 2009 Dec 16.Proc Natl Acad Sci U S A. 2010.PMID: 20018747Free PMC article.