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.
Chimutengwende-Gordon M, Khan WS.Chimutengwende-Gordon M, et al.Curr Stem Cell Res Ther. 2012 Mar;7(2):122-6. doi: 10.2174/157488812799219036.Curr Stem Cell Res Ther. 2012.PMID: 22023632Review.