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.
McGlynn KA, Hagberg K, Chen J, Graubard BI, London WT, Jick S, Sahasrabuddhe VV.McGlynn KA, et al.J Natl Cancer Inst. 2015 Feb 26;107(4):djv009. doi: 10.1093/jnci/djv009. Print 2015 Apr.J Natl Cancer Inst. 2015.PMID: 25722350Free PMC article.