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.
Field DJ, Milner AD, Hopkin IE, Madeley RJ.Field DJ, et al. Among authors: hopkin ie.Br Med J (Clin Res Ed). 1985 May 25;290(6481):1539-42. doi: 10.1136/bmj.290.6481.1539.Br Med J (Clin Res Ed). 1985.PMID: 3924156Free PMC article.
Milner AD, Vyas H, Hopkin IE.Milner AD, et al. Among authors: hopkin ie.Br Med J (Clin Res Ed). 1984 Dec 8;289(6458):1563-5. doi: 10.1136/bmj.289.6458.1563.Br Med J (Clin Res Ed). 1984.PMID: 6439318Free PMC article.