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.
Vidal MA, Walker NJ, Napoli E, Borjesson DL.Vidal MA, et al. Among authors: walker nj.Stem Cells Dev. 2012 Jan 20;21(2):273-83. doi: 10.1089/scd.2010.0589. Epub 2011 May 6.Stem Cells Dev. 2012.PMID: 21410356