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.
Bierer SB, Hull AL.Bierer SB, et al. Among authors: hull al.Eval Health Prof. 2007 Dec;30(4):339-61. doi: 10.1177/0163278707307906.Eval Health Prof. 2007.PMID: 17986669