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.
Halnan KE.Halnan KE.Br Med J (Clin Res Ed). 1983 Dec 17;287(6408):1821-2. doi: 10.1136/bmj.287.6408.1821.Br Med J (Clin Res Ed). 1983.PMID: 6423030Free PMC article.No abstract available.
Halnan KE.Halnan KE.Br Med J (Clin Res Ed). 1984 May 12;288(6428):1458. doi: 10.1136/bmj.288.6428.1458-a.Br Med J (Clin Res Ed). 1984.PMID: 6426603Free PMC article.No abstract available.