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.
Campbell CM, Edwards RR, Fillingim RB.Campbell CM, et al. Among authors: edwards rr.Pain. 2005 Jan;113(1-2):20-6. doi: 10.1016/j.pain.2004.08.013.Pain. 2005.PMID: 15621360
Edwards RR, Smith MT, Kudel I, Haythornthwaite J.Edwards RR, et al.Pain. 2006 Dec 15;126(1-3):272-9. doi: 10.1016/j.pain.2006.07.004. Epub 2006 Aug 22.Pain. 2006.PMID: 16926068