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.
Khalid A, Pal R, Sasatomi E, Swalsky P, Slivka A, Whitcomb D, Finkelstein S.Khalid A, et al.Gut. 2004 Dec;53(12):1860-5. doi: 10.1136/gut.2004.039784.Gut. 2004.PMID: 15542529Free PMC article.
Khalid A, Whitcomb DC.Khalid A, et al.Gastroenterology. 2001 Dec;121(6):1518-20. doi: 10.1016/s0016-5085(01)83856-7.Gastroenterology. 2001.PMID: 11729135No abstract available.
Khalid A, Slivka A.Khalid A, et al.Gastrointest Endosc Clin N Am. 2003 Oct;13(4):695-716, x. doi: 10.1016/s1052-5157(03)00071-0.Gastrointest Endosc Clin N Am. 2003.PMID: 14986794Review.
Khalid A, Finkelstein S, McGrath K.Khalid A, et al.Gastroenterol Clin North Am. 2004 Dec;33(4):891-906. doi: 10.1016/j.gtc.2004.07.007.Gastroenterol Clin North Am. 2004.PMID: 15528024Review.