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.
Lumey LH, Terry MB, Delgado-Cruzata L, Liao Y, Wang Q, Susser E, McKeague I, Santella RM.Lumey LH, et al.Int J Epidemiol. 2012 Feb;41(1):116-23. doi: 10.1093/ije/dyr137. Epub 2011 Sep 29.Int J Epidemiol. 2012.PMID: 22422450Free PMC article.