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.
Ott LE, Carson SD.Ott LE, et al.J Microbiol Biol Educ. 2016 Dec 2;17(3):451-457. doi: 10.1128/jmbe.v17i3.1122. eCollection 2016 Dec.J Microbiol Biol Educ. 2016.PMID: 28101273Free PMC article.