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.
Burton DR, Barbas CF 3rd, Persson MA, Koenig S, Chanock RM, Lerner RA.Burton DR, et al.Proc Natl Acad Sci U S A. 1991 Nov 15;88(22):10134-7. doi: 10.1073/pnas.88.22.10134.Proc Natl Acad Sci U S A. 1991.PMID: 1719545Free PMC article.
Barbas CF 3rd, Hu D, Dunlop N, Sawyer L, Cababa D, Hendry RM, Nara PL, Burton DR.Barbas CF 3rd, et al. Among authors: burton dr.Proc Natl Acad Sci U S A. 1994 Apr 26;91(9):3809-13. doi: 10.1073/pnas.91.9.3809.Proc Natl Acad Sci U S A. 1994.PMID: 8170992Free PMC article.