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.
Bryce A, Costelloe C, Hawcroft C, Wootton M, Hay AD.Bryce A, et al. Among authors: costelloe c.BMC Infect Dis. 2016 Jul 25;16:359. doi: 10.1186/s12879-016-1697-6.BMC Infect Dis. 2016.PMID: 27456093Free PMC article.Review.
Costelloe C, Metcalfe C, Lovering A, Mant D, Hay AD.Costelloe C, et al.BMJ. 2010 May 18;340:c2096. doi: 10.1136/bmj.c2096.BMJ. 2010.PMID: 20483949Review.
Whitburn S, Costelloe C, Montgomery AA, Redmond NM, Fletcher M, Peters TJ, Hay AD.Whitburn S, et al. Among authors: costelloe c.Prim Health Care Res Dev. 2011 Apr;12(2):123-34. doi: 10.1017/S146342361000040X.Prim Health Care Res Dev. 2011.PMID: 21457597