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.
Wirth B, Gassner A, de Bruin ED, Axén I, Swanenburg J, Humphreys BK, Schweinhardt P.Wirth B, et al.Spine (Phila Pa 1976). 2019 Aug 1;44(15):E914-E926. doi: 10.1097/BRS.0000000000003013.Spine (Phila Pa 1976). 2019.PMID: 31335790
Swanenburg J, Koch PP, Meier N, Wirth B.Swanenburg J, et al. Among authors: wirth b.Swiss Med Wkly. 2014 Jun 12;144:w13976. doi: 10.4414/smw.2014.13976. eCollection 2014.Swiss Med Wkly. 2014.PMID: 24921654Free article.