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.
Ross M, Wakefield J.Ross M, et al. Among authors: wakefield j.Biometrics. 2013 Jun;69(2):469-77. doi: 10.1111/biom.12019. Epub 2013 Apr 22.Biometrics. 2013.PMID: 23607570Free PMC article.