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.
Pegalis SE, Bal BS.Pegalis SE, et al. Among authors: bal bs.Clin Orthop Relat Res. 2012 May;470(5):1398-404. doi: 10.1007/s11999-012-2308-5.Clin Orthop Relat Res. 2012.PMID: 22419349Free PMC article.
Sohn DH, Bal BS.Sohn DH, et al. Among authors: bal bs.Clin Orthop Relat Res. 2012 May;470(5):1370-8. doi: 10.1007/s11999-011-2206-2.Clin Orthop Relat Res. 2012.PMID: 22161080Free PMC article.