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.
Hynes-Gay P, Lalla P, Leo M, Merrill-Bell A, Nicholson M, Villaruel E.Hynes-Gay P, et al.Dynamics. 2002 Spring;13(1):17-20, 22-4; quiz 25-6.Dynamics. 2002.PMID: 11951322Review.