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.
Ewel CH, Urba WJ, Kopp WC, Smith JW 2nd, Steis RG, Rossio JL, Longo DL, Jones MJ, Alvord WG, Pinsky CM, et al.Ewel CH, et al. Among authors: rossio jl.Cancer Res. 1992 Jun 1;52(11):3005-10.Cancer Res. 1992.PMID: 1591717Clinical Trial.