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.
Masarani M, Willis RG.Masarani M, et al. Among authors: willis rg.Ann R Coll Surg Engl. 2006 Sep;88(5):496-8. doi: 10.1308/003588406X114884.Ann R Coll Surg Engl. 2006.PMID: 17002859Free PMC article.