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.
Phillips FM, Allen TR, Regan JJ, Albert TJ, Cappuccino A, Devine JG, Ahrens JE, Hipp JA, McAfee PC.Phillips FM, et al.Spine (Phila Pa 1976). 2009 Mar 15;34(6):556-65. doi: 10.1097/BRS.0b013e31819b061c.Spine (Phila Pa 1976). 2009.PMID: 19240664Clinical Trial.