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.
Ringel Y, Carroll IM.Ringel Y, et al.Gastrointest Endosc Clin N Am. 2009 Jan;19(1):141-50, vii. doi: 10.1016/j.giec.2008.12.004.Gastrointest Endosc Clin N Am. 2009.PMID: 19232285Review.
Ringel-Kulka T, Cheng J, Ringel Y, Salojärvi J, Carroll I, Palva A, de Vos WM, Satokari R.Ringel-Kulka T, et al. Among authors: ringel y.PLoS One. 2013 May 23;8(5):e64315. doi: 10.1371/journal.pone.0064315. Print 2013.PLoS One. 2013.PMID: 23717595Free PMC article.