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.
Metcalfe JZ, Longstaffe FJ, Ballenger JA, Haynes CV Jr.Metcalfe JZ, et al. Among authors: longstaffe fj.Proc Natl Acad Sci U S A. 2011 Nov 1;108(44):17916-20. doi: 10.1073/pnas.1113881108. Epub 2011 Oct 24.Proc Natl Acad Sci U S A. 2011.PMID: 22025719Free PMC article.
Hornibrook ER, Longstaffe FJ, Fyfe WS.Hornibrook ER, et al. Among authors: longstaffe fj.Isotopes Environ Health Stud. 2000;36(2):151-76. doi: 10.1080/10256010008032940.Isotopes Environ Health Stud. 2000.PMID: 11077929