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.
Austin DJ, Bonten MJ, Weinstein RA, Slaughter S, Anderson RM.Austin DJ, et al. Among authors: bonten mj.Proc Natl Acad Sci U S A. 1999 Jun 8;96(12):6908-13. doi: 10.1073/pnas.96.12.6908.Proc Natl Acad Sci U S A. 1999.PMID: 10359812Free PMC article.