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.
Byyny RL, Stein LS.Byyny RL, et al. Among authors: stein ls.IMJ Ill Med J. 1975 Oct;148(4):304-7.IMJ Ill Med J. 1975.PMID: 241714No abstract available.