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.
Noel M, Groenewald CB, Beals-Erickson SE, Gebert JT, Palermo TM.Noel M, et al. Among authors: groenewald cb.Pain. 2016 Jun;157(6):1333-1338. doi: 10.1097/j.pain.0000000000000522.Pain. 2016.PMID: 26901806Free PMC article.