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.
Conrad DA, Maynard C, Cheadle A, Ramsey S, Marcus-Smith M, Kirz H, Madden CA, Martin D, Perrin EB, Wickizer T, Zierler B, Ross A, Noren J, Liang SY.Conrad DA, et al.JAMA. 1998 Mar 18;279(11):853-8. doi: 10.1001/jama.279.11.853.JAMA. 1998.PMID: 9516000
Etzioni RD, Feuer EJ, Sullivan SD, Lin D, Hu C, Ramsey SD.Etzioni RD, et al. Among authors: ramsey sd.J Health Econ. 1999 Jun;18(3):365-80. doi: 10.1016/s0167-6296(98)00056-3.J Health Econ. 1999.PMID: 10537900
Ramsey SD, Moinpour CM, Lovato LC, Crowley JJ, Grevstad P, Presant CA, Rivkin SE, Kelly K, Gandara DR.Ramsey SD, et al.J Natl Cancer Inst. 2002 Feb 20;94(4):291-7. doi: 10.1093/jnci/94.4.291.J Natl Cancer Inst. 2002.PMID: 11854391Clinical Trial.