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.
Perkins NJ, Schisterman EF.Perkins NJ, et al. Among authors: schisterman ef.Biom J. 2005 Aug;47(4):428-41. doi: 10.1002/bimj.200410133.Biom J. 2005.PMID: 16161802
Mumford SL, Schisterman EF, Vexler A, Liu A.Mumford SL, et al. Among authors: schisterman ef.Biostatistics. 2006 Oct;7(4):585-98. doi: 10.1093/biostatistics/kxj027. Epub 2006 Mar 10.Biostatistics. 2006.PMID: 16531470