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.
Ågrena J, Oakley CG, McKay JK, Lovell JT, Schemske DW.Ågrena J, et al. Among authors: schemske dw.Proc Natl Acad Sci U S A. 2013 Dec 24;110(52):21077-82. doi: 10.1073/pnas.1316773110. Epub 2013 Dec 9.Proc Natl Acad Sci U S A. 2013.PMID: 24324156Free PMC article.