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.
Laustsen AF, Bech-Azeddine R.Laustsen AF, et al.Eur Spine J. 2016 Nov;25(11):3735-3745. doi: 10.1007/s00586-016-4609-y. Epub 2016 May 13.Eur Spine J. 2016.PMID: 27177469Review.