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.
An HS, Singh K, Vaccaro AR, Wang G, Yoshida H, Eck J, McGrady L, Lim TH.An HS, et al.Spine (Phila Pa 1976). 2004 Feb 1;29(3):257-62. doi: 10.1097/01.brs.0000106979.54651.d6.Spine (Phila Pa 1976). 2004.PMID: 14752346
Vaccaro AR, An HS, Lin S, Sun S, Balderston RA, Cotler JM.Vaccaro AR, et al. Among authors: an hs.J Spinal Disord. 1992 Sep;5(3):320-9. doi: 10.1097/00002517-199209000-00010.J Spinal Disord. 1992.PMID: 1520991
Kupcha PC, An HS, Cotler JM.Kupcha PC, et al. Among authors: an hs.Spine (Phila Pa 1976). 1990 Oct;15(10):1058-63. doi: 10.1097/00007632-199015100-00014.Spine (Phila Pa 1976). 1990.PMID: 2263972
An HS, Andreshak TG, Nguyen C, Williams A, Daniels D.An HS, et al.Spine (Phila Pa 1976). 1995 Aug 15;20(16):1776-82. doi: 10.1097/00007632-199508150-00005.Spine (Phila Pa 1976). 1995.PMID: 7502133