Gurvits Grigoriy E, Lau Nancy, Gualtieri Nicholas, Robilotti James G
Department of Gastroenterology, St. Vincent's Medical Center/New York Medical College, New York, New York, USA.
Gastrointest Endosc. 2009 Mar;69(3 Pt 2):758-9; discussion 759. doi: 10.1016/j.gie.2008.12.238.