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.
Betzel B, Homan J, Aarts E, Janssen I, Spanier M, Wahab P, Groenen M, Berends F.Betzel B, et al.Endoscopy. 2015 Nov;47(11):1050-3. doi: 10.1055/s-0034-1392226. Epub 2015 May 28.Endoscopy. 2015.PMID: 26021308
Koehestanie P, Dogan K, Berends F, Janssen I, Wahab P, Groenen M, Müller M, de Wit N.Koehestanie P, et al.Endosc Int Open. 2014 Mar;2(1):E21-7. doi: 10.1055/s-0034-1365222. Epub 2014 Mar 7.Endosc Int Open. 2014.PMID: 26134609Free PMC article.