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.
Valcuende M, Calabuig R, Martínez-Ibernón A, Soto J.Valcuende M, et al. Among authors: calabuig r.Materials (Basel). 2020 Nov 14;13(22):5135. doi: 10.3390/ma13225135.Materials (Basel). 2020.PMID: 33202538Free PMC article.