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.
Greenwood CM, Bull SB.Greenwood CM, et al. Among authors: bull sb.Genet Epidemiol. 1997;14(6):635-40. doi: 10.1002/(SICI)1098-2272(1997)14:6<635::AID-GEPI14>3.0.CO;2-R.Genet Epidemiol. 1997.PMID: 9433555
Liu Y, Tritchler D, Bull SB.Liu Y, et al. Among authors: bull sb.Genet Epidemiol. 2002 Jan;22(1):26-40. doi: 10.1002/gepi.1041.Genet Epidemiol. 2002.PMID: 11754471