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.
Amadi-Obi A, Yu CR, Liu X, Mahdi RM, Clarke GL, Nussenblatt RB, Gery I, Lee YS, Egwuagu CE.Amadi-Obi A, et al. Among authors: yu cr.Nat Med. 2007 Jun;13(6):711-8. doi: 10.1038/nm1585. Epub 2007 May 13.Nat Med. 2007.PMID: 17496900