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.
Neil-Dwyer G, Walter P, Cruickshank JM, Doshi B, O'Gorman P.Neil-Dwyer G, et al. Among authors: doshi b.Br Med J. 1978 Oct 7;2(6143):990-2. doi: 10.1136/bmj.2.6143.990.Br Med J. 1978.PMID: 361155Free PMC article.Clinical Trial.