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.
Avis NE, Smith KW, McGraw S, Smith RG, Petronis VM, Carver CS.Avis NE, et al. Among authors: petronis vm.Qual Life Res. 2005 May;14(4):1007-23. doi: 10.1007/s11136-004-2147-2.Qual Life Res. 2005.PMID: 16041897