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.
Coleman T, Antoniak M, Britton J, Thornton J, Lewis S, Watts K.Coleman T, et al.BMC Health Serv Res. 2004 Nov 1;4(1):29. doi: 10.1186/1472-6963-4-29.BMC Health Serv Res. 2004.PMID: 15518592Free PMC article.
Agboola SA, Coleman TJ, McNeill AD.Agboola SA, et al.BMC Health Serv Res. 2009 Apr 24;9:67. doi: 10.1186/1472-6963-9-67.BMC Health Serv Res. 2009.PMID: 19393052Free PMC article.