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.
Larson AN, Santos ER, Polly DW Jr, Ledonio CG, Sembrano JN, Mielke CH, Guidera KJ.Larson AN, et al. Among authors: polly dw jr.Spine (Phila Pa 1976). 2012 Feb 1;37(3):E188-94. doi: 10.1097/BRS.0b013e31822a2e0a.Spine (Phila Pa 1976). 2012.PMID: 21738101