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.
Ray GT, Collin F, Lieu T, Fireman B, Colby CJ, Quesenberry CP, Van den Eeden SK, Selby JV.Ray GT, et al.Med Care Res Rev. 2000 Mar;57(1):92-109. doi: 10.1177/107755870005700106.Med Care Res Rev. 2000.PMID: 10705704
Herrinton LJ, Liu L, Fireman B, Lewis JD, Allison JE, Flowers N, Hutfless S, Velayos FS, Abramson O, Altschuler A, Perry GS.Herrinton LJ, et al.Gastroenterology. 2009 Aug;137(2):502-11. doi: 10.1053/j.gastro.2009.04.063. Epub 2009 May 13.Gastroenterology. 2009.PMID: 19445944