Moawad Fouad J, Gentry Andrew B, Humphries Ashley, Young Patrick E
Gastroenterology Service, Department of Medicine, Walter Reed Army Medical Center, Washington, DC, USA.
Gastrointest Endosc. 2010 Oct;72(4):847-8. doi: 10.1016/j.gie.2010.03.1055. Epub 2010 Jun 11.