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.
Khattab M, Al-Karmalawy AA.Khattab M, et al.Front Chem. 2021 Mar 24;9:628398. doi: 10.3389/fchem.2021.628398. eCollection 2021.Front Chem. 2021.PMID: 33842429Free PMC article.