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.
McKenzie JE, French SD, O'Connor DA, Grimshaw JM, Mortimer D, Michie S, Francis J, Spike N, Schattner P, Kent PM, Buchbinder R, Green SE.McKenzie JE, et al. Among authors: grimshaw jm.Implement Sci. 2008 Feb 22;3:11. doi: 10.1186/1748-5908-3-11.Implement Sci. 2008.PMID: 18294375Free PMC article.