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.
Siriwardena A, Mason J.Siriwardena A, et al.Gastroenterology. 2013 Mar;144(3):e20-1. doi: 10.1053/j.gastro.2013.01.050. Epub 2013 Jan 26.Gastroenterology. 2013.PMID: 23357063No abstract available.