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.
Sawka CA, O'Connor AM, Llewellyn-Thomas HA, To T, Pinfold SP, Harrison-Woermke D.Sawka CA, et al.J Clin Oncol. 1995 Jun;13(6):1459-69. doi: 10.1200/JCO.1995.13.6.1459.J Clin Oncol. 1995.PMID: 7751893