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.
Kaplan AH, Michael SF, Wehbie RS, Knigge MF, Paul DA, Everitt L, Kempf DJ, Norbeck DW, Erickson JW, Swanstrom R.Kaplan AH, et al. Among authors: wehbie rs.Proc Natl Acad Sci U S A. 1994 Jun 7;91(12):5597-601. doi: 10.1073/pnas.91.12.5597.Proc Natl Acad Sci U S A. 1994.PMID: 8202533Free PMC article.