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.
Jansen M, de Leng WW, Baas AF, Myoshi H, Mathus-Vliegen L, Taketo MM, Clevers H, Giardiello FM, Offerhaus GJ.Jansen M, et al.Gut. 2006 Jan;55(1):1-5. doi: 10.1136/gut.2005.069062.Gut. 2006.PMID: 16344569Free PMC article.