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.
Marquez-Chin C, Popovic MR.Marquez-Chin C, et al.Biomed Eng Online. 2020 May 24;19(1):34. doi: 10.1186/s12938-020-00773-4.Biomed Eng Online. 2020.PMID: 32448143Free PMC article.Review.