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.
Alexander D, Hoffmann J, Munz A, Friedrich B, Geis-Gerstorfer J, Reinert S.Alexander D, et al.J Mater Sci Mater Med. 2008 Mar;19(3):965-74. doi: 10.1007/s10856-007-3351-8. Epub 2007 Dec 25.J Mater Sci Mater Med. 2008.PMID: 18158613