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.
Schmitt A, van Griensven M, Imhoff AB, Buchmann S.Schmitt A, et al. Among authors: imhoff ab.Stem Cells Int. 2012;2012:394962. doi: 10.1155/2012/394962. Epub 2012 Feb 23.Stem Cells Int. 2012.PMID: 22550505Free PMC article.