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.
Hurwitz EL, Morgenstern H, Harber P, Kominski GF, Belin TR, Yu F, Adams AH; University of California-Los Angeles.Hurwitz EL, et al. Among authors: harber p.Spine (Phila Pa 1976). 2002 Oct 15;27(20):2193-204. doi: 10.1097/00007632-200210150-00002.Spine (Phila Pa 1976). 2002.PMID: 12394892Clinical Trial.