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.
van Bavel J, Findlay SR, Hampel FC Jr, Martin BG, Ratner P, Field E.van Bavel J, et al. Among authors: findlay sr.Arch Intern Med. 1994 Dec 12-26;154(23):2699-704. doi: 10.1001/archinte.1994.00420230086010.Arch Intern Med. 1994.PMID: 7993153Clinical Trial.