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.
Besser RE, Lett SM, Weber JT, Doyle MP, Barrett TJ, Wells JG, Griffin PM.Besser RE, et al. Among authors: wells jg.JAMA. 1993 May 5;269(17):2217-20.JAMA. 1993.PMID: 8474200
Bell BP, Goldoft M, Griffin PM, Davis MA, Gordon DC, Tarr PI, Bartleson CA, Lewis JH, Barrett TJ, Wells JG, et al.Bell BP, et al. Among authors: wells jg.JAMA. 1994 Nov 2;272(17):1349-53.JAMA. 1994.PMID: 7933395