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.
Kim JH, Park SH, Park SG, Choi JS, Xia Y, Sung JH.Kim JH, et al. Among authors: sung jh.Stem Cells Dev. 2011 Oct;20(10):1753-61. doi: 10.1089/scd.2010.0469. Epub 2011 Mar 2.Stem Cells Dev. 2011.PMID: 21265612Free PMC article.
Kim JH, Song SY, Park SG, Song SU, Xia Y, Sung JH.Kim JH, et al. Among authors: sung jh.Stem Cells Dev. 2012 Aug 10;21(12):2212-21. doi: 10.1089/scd.2011.0561. Epub 2012 Feb 3.Stem Cells Dev. 2012.PMID: 22181007Free PMC article.