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.
Demb JB, Boynton GM, Heeger DJ.Demb JB, et al. Among authors: heeger dj.Proc Natl Acad Sci U S A. 1997 Nov 25;94(24):13363-6. doi: 10.1073/pnas.94.24.13363.Proc Natl Acad Sci U S A. 1997.PMID: 9371851Free PMC article.Clinical Trial.
Gandhi SP, Heeger DJ, Boynton GM.Gandhi SP, et al. Among authors: heeger dj.Proc Natl Acad Sci U S A. 1999 Mar 16;96(6):3314-9. doi: 10.1073/pnas.96.6.3314.Proc Natl Acad Sci U S A. 1999.PMID: 10077681Free PMC article.