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.
Wallace LS, DeVoe JE, Rogers ES, Protheroe J, Rowlands G, Fryer GE Jr.Wallace LS, et al. Among authors: rogers es.BMC Health Serv Res. 2009 Dec 21;9:240. doi: 10.1186/1472-6963-9-240.BMC Health Serv Res. 2009.PMID: 20025725Free PMC article.