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.
Vellinga A, Cormican M, Hanahoe B, Murphy AW.Vellinga A, et al. Among authors: murphy aw.Br J Gen Pract. 2010 Jul;60(576):511-3. doi: 10.3399/bjgp10X514765.Br J Gen Pract. 2010.PMID: 20594440Free PMC article.
Vellinga A, Cormican M, Hanahoe B, Bennett K, Murphy AW.Vellinga A, et al. Among authors: murphy aw.BMC Med Res Methodol. 2011 Apr 6;11:40. doi: 10.1186/1471-2288-11-40.BMC Med Res Methodol. 2011.PMID: 21470399Free PMC article.