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.
Evans DT, Giles M, Horne DJ, d'Apice AJ, Riglar A, Toh BH.Evans DT, et al. Among authors: riglar a.Postgrad Med J. 1981 Apr;57(666):247-51. doi: 10.1136/pgmj.57.666.247.Postgrad Med J. 1981.PMID: 7291106Free PMC article.