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.
Nadler ST, Stoehr JP, Schueler KL, Tanimoto G, Yandell BS, Attie AD.Nadler ST, et al. Among authors: attie ad.Proc Natl Acad Sci U S A. 2000 Oct 10;97(21):11371-6. doi: 10.1073/pnas.97.21.11371.Proc Natl Acad Sci U S A. 2000.PMID: 11027337Free PMC article.