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.
Welander PV, Coleman ML, Sessions AL, Summons RE, Newman DK.Welander PV, et al.Proc Natl Acad Sci U S A. 2010 May 11;107(19):8537-42. doi: 10.1073/pnas.0912949107. Epub 2010 Apr 26.Proc Natl Acad Sci U S A. 2010.PMID: 20421508Free PMC article.
Welander PV, Summons RE.Welander PV, et al.Proc Natl Acad Sci U S A. 2012 Aug 7;109(32):12905-10. doi: 10.1073/pnas.1208255109. Epub 2012 Jul 23.Proc Natl Acad Sci U S A. 2012.PMID: 22826256Free PMC article.