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.
Harron K, Wade A, Gilbert R, Muller-Pebody B, Goldstein H.Harron K, et al. Among authors: gilbert r.BMC Med Res Methodol. 2014 Mar 5;14:36. doi: 10.1186/1471-2288-14-36.BMC Med Res Methodol. 2014.PMID: 24597489Free PMC article.
Harron K, Hagger-Johnson G, Gilbert R, Goldstein H.Harron K, et al. Among authors: gilbert r.BMC Med Res Methodol. 2017 Feb 7;17(1):23. doi: 10.1186/s12874-017-0306-8.BMC Med Res Methodol. 2017.PMID: 28173759Free PMC article.