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.
Sury M, Bullock I, Rabar S, Demott K; Guideline Development Group.Sury M, et al.BMJ. 2010 Dec 16;341:c6819. doi: 10.1136/bmj.c6819.BMJ. 2010.PMID: 21163835No abstract available.