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.
Leroi AM, Bennett AF, Lenski RE.Leroi AM, et al. Among authors: bennett af.Proc Natl Acad Sci U S A. 1994 Mar 1;91(5):1917-21. doi: 10.1073/pnas.91.5.1917.Proc Natl Acad Sci U S A. 1994.PMID: 8127906Free PMC article.
Bennett AF, Lenski RE.Bennett AF, et al.Proc Natl Acad Sci U S A. 2007 May 15;104 Suppl 1(Suppl 1):8649-54. doi: 10.1073/pnas.0702117104. Epub 2007 May 9.Proc Natl Acad Sci U S A. 2007.PMID: 17494741Free PMC article.
Riehle MM, Bennett AF, Long AD.Riehle MM, et al. Among authors: bennett af.Proc Natl Acad Sci U S A. 2001 Jan 16;98(2):525-30. doi: 10.1073/pnas.98.2.525. Epub 2001 Jan 9.Proc Natl Acad Sci U S A. 2001.PMID: 11149947Free PMC article.