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.
Sung JH, Jeong JS.Sung JH, et al. Among authors: jeong js.Biomed Eng Online. 2014 Oct 11;13:143. doi: 10.1186/1475-925X-13-143.Biomed Eng Online. 2014.PMID: 25303996Free PMC article.