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.
Wen XD, Xiao L, Wang T, Navarro-Alvarez N, Liu WH.Wen XD, et al.Dig Endosc. 2018 May;30(3):372-379. doi: 10.1111/den.12987. Epub 2017 Dec 12.Dig Endosc. 2018.PMID: 29168230