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.
Chak A, Cooper GS, Canto MI, Pollack BJ, Sivak MV Jr.Chak A, et al. Among authors: cooper gs.Gastrointest Endosc. 1998 Feb;47(2):144-8. doi: 10.1016/s0016-5107(98)70347-5.Gastrointest Endosc. 1998.PMID: 9512279
Cooper GS, Chak A, Harper DL, Pine M, Rosenthal GE.Cooper GS, et al.Gastroenterology. 1996 Aug;111(2):385-90. doi: 10.1053/gast.1996.v111.pm8690203.Gastroenterology. 1996.PMID: 8690203
Chak A, Cooper GS, Blades EW, Canto M, Sivak MV Jr.Chak A, et al. Among authors: cooper gs.Gastrointest Endosc. 1996 Jul;44(1):54-7. doi: 10.1016/s0016-5107(96)70229-8.Gastrointest Endosc. 1996.PMID: 8836717
Chak A, Canto M, Stevens PD, Lightdale CJ, Van de Mierop F, Cooper G, Pollack BJ, Sivak MV Jr.Chak A, et al.Gastrointest Endosc. 1997 Mar;45(3):291-5. doi: 10.1016/s0016-5107(97)70272-4.Gastrointest Endosc. 1997.PMID: 9087836No abstract available.
Chak A, Koehler MK, Sundaram SN, Cooper GS, Canto MI, Sivak MV Jr.Chak A, et al. Among authors: cooper gs.Gastrointest Endosc. 1998 Jan;47(1):18-22. doi: 10.1016/s0016-5107(98)70293-7.Gastrointest Endosc. 1998.PMID: 9468418