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.
Stapleton JV, Austin KL, Mather LE.Stapleton JV, et al. Among authors: mather le.Br Med J. 1978 Nov 25;2(6150):1499. doi: 10.1136/bmj.2.6150.1499-b.Br Med J. 1978.PMID: 719499Free PMC article.No abstract available.