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.
Yuan Y, Dayton JR, Freese ML, Dorflinger BG, Cruz-Orengo L.Yuan Y, et al. Among authors: cruz orengo l.J Vis Exp. 2020 Jan 12;(155). doi: 10.3791/60291.J Vis Exp. 2020.PMID: 31984956