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.
De Wijs-Meijler DP, Stam K, van Duin RW, Verzijl A, Reiss IK, Duncker DJ, Merkus D.De Wijs-Meijler DP, et al.J Vis Exp. 2016 Feb 9;(108):e53772. doi: 10.3791/53772.J Vis Exp. 2016.PMID: 26889804Free PMC article.