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.
Barnsley L, Lord S, Bogduk N.Barnsley L, et al. Among authors: lord s.Pain. 1993 Oct;55(1):99-106. doi: 10.1016/0304-3959(93)90189-V.Pain. 1993.PMID: 8278215Clinical Trial.
Barnsley L, Lord SM, Wallis BJ, Bogduk N.Barnsley L, et al. Among authors: lord sm.Spine (Phila Pa 1976). 1995 Jan 1;20(1):20-5; discussion 26. doi: 10.1097/00007632-199501000-00004.Spine (Phila Pa 1976). 1995.PMID: 7709275