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.
Thompson DS, Estabrooks CA, Scott-Findlay S, Moore K, Wallin L.Thompson DS, et al. Among authors: moore k.Implement Sci. 2007 May 11;2:15. doi: 10.1186/1748-5908-2-15.Implement Sci. 2007.PMID: 17498301Free PMC article.